This book was written by author and trans-man Matt Kailey to help parents adjust to their adult children changing gender.
Note: while this book is around change of gender (male to female, female to male), the information in it is just as relevant for parents of gender-questioning and genderqueer people.
About the author
(from the Tranifesto website)
Matt Kailey is a transsexual man and an award-winning author, blogger, teacher, and community leader, as well as a nationally recognized speaker and trainer on transgender issues.