Crusade

Crusade is a 3-book series with 2 released primary works first released in 2008 with contributions by Rachel Caine, Cecil Castellucci, Cassandra Clare, Karen Mahoney, Maria V. Snyder, Holly Black, Kelley Armstrong, Libba Bray, Sarah Rees Brennan, Nancy Holder, Debbie Viguié, Lilith Saintcrow, Dina James, Melissa De La Cruz, and J. Michael Straczynski.