Books for couples:
Five Love Languages by Gary Chapman

Getting the Love You Want by Harville Hendrix

Getting the Sex You Want by Tammy Nelson

Intimacy and Desire by David Schnarch, PhD

Mating in Captivity by Esther Perel

The Seven Principles for Making Marriage Work by John M. Gottman and Nan Silver

Transgender Resources

“True Selves: Understanding Transsexualism — For Families, Friends, Coworkers and Helping Professionals” by Mildren L. Brown and Chloe Ann Rounsley

The following websites can be helpful:

The World Professional Association for Transgender Health

The Gender Identity Center of Colorado

The Center Colorado