What was...? is a 30-book series with 44 primary works first released in 2013 with contributions by Patricia Brennan Demuth, Kathleen Krull, Janet B. Pascal, Joan Holub, Who H.Q., Jim O'Connor, Pam Pollack, Meg Belviso, Who Hq, Judith St. George, Gail Herman, Gail Herman, Megan Stine, Deborah Hopkinson, Nico Medina, Sarah Fabiny, Jill Abramson, Douglas Yacka, Sherri L. Smith, Dorothy Hoobler, Thomas Hoobler, Varian Johnson, Jess M Brallier, Catherine Daly, Jake Murray, Steve Korté, Gina Shaw, and Ben Hubbard.