DK Biography is a 18-book series with 18 released primary works first released in 2004 with contributions by Tanya Lee Stone, Howard S. Kaplan, Amy Pastan, Leslie Garrett, Vicki Cobb, Frieda Wishinsky, Lenny Hort, Joanne Mattern, Kem Knapp Sawyer, D.K. Publishing, Charles M. Wills, Kathleen V. Kudlinski, Maya Gold, and Michael Burgan.