Mark A. Michaels and Patricia Johnson, co-authors of Designer Relationships, are a devoted married couple. They have been creative collaborators since 1999, and their critically acclaimed titles have garnered numerous awards. Michaels and Johnson are the authors of Partners in Passion, Great Sex Made Simple, Tantra for Erotic Empowerment, and The Essence of Tantric Sexuality. They are also the creators of the meditation CD set Ananda Nidra: Blissful Sleep.