Wide-ranging resources for trans youth and the people who care about them, including many informational PDFs.
Raven Kaldera’s Activist Writings
Kaldera has several essays about transgender issues and transsexuality. Some of them are about sex.
The website of Leslie Feinberg, a longtime sex and gender liberationist.
A prolific author and activist for the transgender community.
Transgender Law and Policy Institute
A non-profit organization to help represent transgender interests in legal and political matters. Lots of information about current legislation and litigation.
Books (links lead to Google books, which may or may not have previews)
My Gender Workbook, by Kate Bornstein
If you are questioning any of your assumptions about gender, or if you think you should be, this is the book for you. Text and helpful exercises. I recommend doing the exercises on separate paper and redoing them periodically to see how your relationship with your gender changes with experience.
Transgender Warriors, by Leslie Feinberg
Stories of historical and contemporary gender transgressors of all kinds.
Just Add Hormones, by Matt Kailey
One transman’s account of his journey through therapeutic, hormonal, surgical, and social transition.
Transforming Families, by Mary Boenke
Stories written and told by the parents, grandparents, spouses, siblings, children, and friends of transgender people.
True Selves, by Mildred L Brown and Chloe Ann Rounsley
Helpful book for understanding some of the things that transgender people can go through.
Transsexual Workers, by Janis Walworth
A book designed to help employers better understand and accommodate their transgender employees and increase awareness of transgender issues in the workplace.
Consider giving them one of the books above such as Transforming Families or True Selves to give them some background for the conversation if they are not as familiar with transgender topics.
Your primary care doctor.
If you have questions about gender or sexuality, your regular doctor may be able to help you or refer you to a specialist.
If you seeing a therapist or other mental health care professional, a healthy understanding of your gender identity and sexuality is essential to your mental health and well-being. If you are considering transition, you will also need to see several specialists and your therapist may be able to give you a referral.
Your school counselor.
If you are a teenager and are uncomfortable speaking to your parents, your school counselor may be able to help you. Many adolescents, teens, and young adults have questions about gender and sexuality, and your school counselor should be equipped to listen to you and possibly recommend resources.
Local gay/straight alliance or other queer support group.
Many colleges and high schools have these organizations, some even with websites, offices, and a full- or part-time adult advisor or facilitator. Check out what resources you have in your community.