American Girl History Mysteries is a 22-book series with 22 released primary works first released in 1999 with contributions by Sarah Masters Buckey, Holly Hughes, Elizabeth McDavid Jones, Katherine Ayres, Evelyn Coleman, Kathleen Ernst, Megan McDonald, Eleanora E. Tate, Kathryn Reiss, Barbara Steiner, Alison Hart, and Greg Dearth.