Zire Golf - Shop now
$3.99 with 73 percent savings
Digital List Price: $14.99

These promotions will be applied to this item:

Some promotions may be combined; others are not eligible to be combined with other offers. For details, please see the Terms & Conditions associated with these promotions.

You've subscribed to ! We will preorder your items within 24 hours of when they become available. When new books are released, we'll charge your default payment method for the lowest price available during the pre-order period.
Update your device or payment method, cancel individual pre-orders or your subscription at
Your Memberships & Subscriptions
Kindle app logo image

Download the free Kindle app and start reading Kindle books instantly on your smartphone, tablet, or computer - no Kindle device required.

Read instantly on your browser with Kindle for Web.

Using your mobile phone camera - scan the code below and download the Kindle app.

QR code to download the Kindle App

Follow the author

Something went wrong. Please try your request again later.

Between XX and XY: Intersexuality and the Myth of Two Sexes Kindle Edition

4.3 out of 5 stars 45 ratings

Providing a fascinating look at the science of sex and what makes people male or female, this book explains dozens of intersex conditions—such as hermaphroditism, Klinefelter syndrome, and androgen insensitivity syndrome—and includes personal interviews with people living with these conditions telling their surprising and often heart-wrenching stories. Even doctors and scientists are not entirely sure if external genitalia, internal sex organs, chromosomes, DNA, environment, or some combination define a person's sex, but this examination shows that sex is not an either-or proposition: not girl/boy, XX/XY—there are babies born XYY, XXX, or with any dozen or more known variations in the X or Y chromosomes. The history and the current treatment for intersex conditions as well as the options that are available today for the ambiguous child are covered in this captivating account that truly shows what it means to be human.

Editorial Reviews

From Publishers Weekly

Combining passion with current scientific information, Callahan, an immunologist/pathologist at Colorado State University, explains why our conception of two sexes is more a social than a biological construct. He argues that there are no simple, foolproof ways to determine sex. For example chromosomal structure, XX for females and XY for males, is not fully predictive because of various genetic disorders that can play a larger role. Similarly, genitalia can be quite varied and represent a continuum of difference rather than two discrete points. Callahan does a good job of exploring intersex individuals, who are neither male nor female, and argues that they need to be accepted for what they are and not viewed as defective. Further, he provides provocative evidence that surgical gender reconstruction is often unsuccessful. Although Callahan attempts to make the case that some non-Western societies have a less bipolar view of gender, his abbreviated presentation is not very convincing. He is, however, persuasive that better understanding of and respect for sex and gender variability would be far healthier for the 65,000-plus intersex people born each year and society in general. (July)
Copyright © Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.

Review

"This book takes readers through an alphabet of gender and gender variations. Callahan shows readers that rather than either/or scenarios, there have always been variations; his book shatters our society's take on pink and blue." —Advocate.com

"There are lots of interesting nuggets here—for example, Callahan's description of biological sex as a spectrum, not a binary system." —
Double X

"The book is really beautifully written, highly accessible, and visionary in its own right." —
Feministing

"This is a fascinating, easily understandable journey into why we are born male or female and examines our age-old obsession with sex." —
Fort Collins Coloradoan

"Immunologist Callahan takes a fascinating look at the biology and human experience of intersexuality, a state in between male and female." —
Discover Magazine

“This book takes readers through an alphabet of gender and gender variations. Callahan shows readers that rather than either/or scenarios, there have always been variations; his book shatters our society’s take on pink and blue.” —Advocate

"Callahan does a good job of exploring intersex individuals, who are neither male nor female, and argues that they need to be accepted for what they are and not viewed as defective." —
Publishers Weekly

"Callahan's writing style is both accessible and engaging; it reads more like creative non-fiction, a la Malcolm Gladwell." —
Ms. Magazine

Product details

  • ASIN ‏ : ‎ B005HF3Q40
  • Publisher ‏ : ‎ Chicago Review Press
  • Accessibility ‏ : ‎ Learn more
  • Publication date ‏ : ‎ July 1, 2009
  • Edition ‏ : ‎ Illustrated
  • Language ‏ : ‎ English
  • File size ‏ : ‎ 2.2 MB
  • Screen Reader ‏ : ‎ Supported
  • Enhanced typesetting ‏ : ‎ Enabled
  • X-Ray ‏ : ‎ Not Enabled
  • Word Wise ‏ : ‎ Enabled
  • Print length ‏ : ‎ 209 pages
  • ISBN-13 ‏ : ‎ 978-1569762912
  • Page Flip ‏ : ‎ Enabled
  • Customer Reviews:
    4.3 out of 5 stars 45 ratings

About the author

Follow authors to get new release updates, plus improved recommendations.
Gerald N. Callahan
Brief content visible, double tap to read full content.
Full content visible, double tap to read brief content.

Since leaving graduate school in 1974, the author has pursued biomedical research, first as part of a Nobel Prize-winning team at Scripps Clinic and Research Foundation, and since 1984 in the Department of Microbiology, Immunology, and Pathology at Colorado State University. All of this research focuses on the workings of human immune and nervous systems and the nature of human selves. In 2004, in recognition of his literary contributions to popular scientific literature, Dr. Callahan received a joint appointment in the Department of English at CSU and between 2011 and 2013 served as the director of the Graduate Creative Nonfiction program in that department. During his career, he has published more than 50 scientific papers in respected scientific journals and more than 70 poems and essays in literary journals as well as four popular-science books. He has received numerous awards for his science, his writing, and his teaching. These include three National Research Service Awards, designation as a Leukemia Society of America Scholar, a Colorado Council on the Arts Fellowship, nomination for a Pulitzer Prize, and the Outstanding Science Faculty Award in 2012. Because of his literary accomplishments, Dr. Callahan is also the Director of the Creative Nonfiction Graduate Program in the Department of English at CSU. Dr. Callahan and his work have been featured in or on, among others: National Geographic Television, ABC Evening News, the Los Angeles Times, Salon.com, the Chicago Tribune, National Public Radio, Minnesota Public Radio, Talk Radio Europe - Spain, Ms. Magazine, the New Scientist, Discover Magazine, USA Today, the Vancouver Sun, the Canadian Broadcasting Corporation, Georgia Straight, the Rocky Mountain News, ESPN, Publisher's Weekly, Semana Magazine - Columbia, and EPOCA magazine - Brazil.

Customer reviews

4.3 out of 5 stars
45 global ratings

Review this product

Share your thoughts with other customers

Customers say

Customers find the book very informative, particularly praising how it expounds on the amazing world of gender in considerable detail. The writing style receives mixed reactions, with some customers finding it simplistic while others note it reads like a college textbook.

8 customers mention "Information quality"8 positive0 negative

Customers find the book informative and well-researched, providing detailed insights into the amazing world of gender, with one customer noting how it presents the history of our understanding of sex.

"...reduce legitimacy to two, this from Gerald Callahan is a very welcome study on how gender and sex in the biological world actually work...." Read more

"...Presenting the history of our understanding of sex along with the current state of knowledge brings an historical continuity to the book, which was..." Read more

"...conception, gestation, and birth is explored in this interesting, informative book...." Read more

"An eye opening book to dissolve the misunderstandings concerning sexuality, and all it's expressions." Read more

5 customers mention "Writing style"2 positive3 negative

Customers have mixed opinions about the writing style of the book, with some finding it simplistic, while another customer notes it reads like a college textbook.

"I really learned a lot, but the author can be a bit dramatic and sensational at times. Also some of the writing and verbage isn't the best." Read more

"...This is a good book if you want a primer on the subject of intersexuality, either for yourself or as a gift." Read more

"...It read like a college textbook...." Read more

"OKay reading." Read more

Top reviews from the United States

  • Reviewed in the United States on February 12, 2025
    In the contemporary political space that contests gender and sex designations, and when some quarters want to reduce legitimacy to two, this from Gerald Callahan is a very welcome study on how gender and sex in the biological world actually work. If you want a responsible, scientific grounding in x's and y's, here's a fine place to start. If, however, you're happy with being told a number (two) by political authorities that doesn't actually exist in nature, then move along. Nothing to see here.
  • Reviewed in the United States on March 16, 2010
    I chose this book because of its synopsis and the reviews of others, and am glad that I did. The author's style is very readable and he makes a very complex subject understandable. While its obvious that he has definite opinions on this subject, he does a good job of keeping them in check while he writes. Presenting the history of our understanding of sex along with the current state of knowledge brings an historical continuity to the book, which was helpful. Excellent footnoting and bibliography for those who wish to read further. All the different intersex variations become a bit difficult to keep separate after awhile, but I suspect that's more my unfamiliarity with the subject than his writing.

    This is a good book if you want a primer on the subject of intersexuality, either for yourself or as a gift.
    9 people found this helpful
    Report
  • Reviewed in the United States on July 10, 2015
    Format: KindleVerified Purchase
    The scripted play of conception, gestation, and birth is explored in this interesting, informative book. Sometimes all the things that should happen, when they are supposed to happen to produce a "boy" or a "girl", go array. These newborns may or may not appear to be out of the "ordinary" at birth, but later on in life they may have problems mostly brought on by the binary gendered society they live in.
    One person found this helpful
    Report
  • Reviewed in the United States on December 19, 2020
    Format: PaperbackVerified Purchase
    An eye opening book to dissolve the misunderstandings concerning sexuality, and all it's expressions.
  • Reviewed in the United States on July 13, 2022
    Format: KindleVerified Purchase
    I really learned a lot, but the author can be a bit dramatic and sensational at times. Also some of the writing and verbage isn't the best.
  • Reviewed in the United States on July 6, 2011
    I am a hermaphrodite with Klinefelter syndrome and androgen insensitvity syndrome and I need to read every page of this book over and over, but I got to page one hundred and it went to page sixty-nine. Then the book goes to sixty-nine to one hundred and starts again on page 133. My medical records made by the U.S. Army found me to be a female hermaphrodite and I am trying to understand why I am now a female army officer. I will do what I can to help fix the problem and enrich the study of hermaphroditism which has three cases in my family. Jo XXY
    4 people found this helpful
    Report
  • Reviewed in the United States on March 10, 2015
    Very informative and good for layperson to understand. Really confronts the problem of doctors being too quick to assign a sex to a baby whose genitals may be ambiguous.
  • Reviewed in the United States on April 29, 2021
    Format: Paperback
    Dr. Callahan wrote a tremendous book. He wrote about a very complex subject in a very readable style. His topic applies to all humans around the world.

Report an issue


Does this item contain inappropriate content?
Do you believe that this item violates a copyright?
Does this item contain quality or formatting issues?