These are books that I have personally read and recommend.

Always My Child: A Parent’s Guide to Understanding Your Gay, Lesbian, Bisexual, Transgendered or Questioning Son or Daughter 

by Kevin Jennings and Pat Shapiro

Beyond Acceptance: Parents of Lesbians & Gays Talk About Their Experiences

by Carolyn W. Griffin and Marian J. Wirth 

Is It a Choice? Answers to the Most Frequently Asked Questions About Gay & Lesbian People, Third Edition

by Eric Marcus

Straight Parents, Gay Children: Keeping Families Together  

by Robert A. Bernsten

What the Bible Really Says About Homosexuality

by Daniel A. Helminiak

The Transgender Child: A Handbook for Families and Professionals 

by Stephanie A. Brill and Rachel Pepper

Transgender Explained For Those Who Are Not 

by Joanne Herman