I'm Your Daughter, Too: The True Story of a Mother's Struggle to Accept Her Transsexual Child, by R. Madison Amato. Create Space, 2012.
Available on Amazon.com.
Jazz Mergirl: The True Story of Jazz Jennings, a Transgender Girl Born in a Boy's Body, edited by Bruce Edlen. CreateSpace, 2015.
Available on Amazon.com.
Mom, I need to be a Girl, by Just Evelyn Walter. Trook Publishing, 1998.
Available free at http://ai.eecs.umich.edu/people/conway/TS/Evelyn/Evelyn.html, or on Amazon.com.
Raising My Rainbow: Adventures in Raising a Fabulous, Gender Creative Son, by Lori Duron. Broadway Books, 2013.
Available on Amazon.com.
Trading Places: When Our Son Became a Daughter--A Mother's Story of a Family's Transition, by Jane Baker. Braefield Press, 2014.
Available on Amazon.com.
Transitions of the Heart: Stories of Love, Struggle and Acceptance by Mothers of Transgender and Gender Variant Children, edited by Rachel Pepper. Cleis Press, 2012.
Available on Amazon.com.