Darkest Powers is a 9-book series with 3 released primary works first released in 2008 with contributions by Kelley Armstrong, Rachel Vincent, Sarah Rees Brennan, Jeri Smith-Ready, Mary E. Pearson, Jennifer Lynn Barnes, Jessica Verday, Claudia Gray, Jackson Pearce, Carrie Ryan, Rachel Caine, Kami Garcia, Margaret Stohl, Kimberly Derting, and Ally Condie.