33⅓ Main Series is a 24-book series with 24 released primary works first released in 2003 with contributions by Andrew Hultkrans, Colin Meloy, Alex Green, Eric Weisbard, Carl Wilson, Drew Daniel, Bob Gendron, Geeta Dayal, Marvin Lin, Rob Trucks, Bryan Waterman, Bryan C. Parker, Rebecca Wallwork, Rolf Potts, Jenn Pelly, Will Stockton, D. Gilson, Amy Gentry, David Evans, Santi Elijah Holley, Loren Glass, Annie Zaleski, Erin Osmon, Ryan Pinkard, and Michael Dango.