S.H.I.E.L.D. is a 15-book series with 15 released primary works first released in 1991 with contributions by Brian Michael Bendis, Charles Knauf, Roberto de la Torre, Stefano Caselli, Jonathan Hickman, Kathryn Immonen, Stan Lee, Ed Brubaker, Steve Englehart, Doug Murray, D.G. Chichester, Scott Lobdell, and Dennis O'Neil.