Doctor Who Target Books (Numerical Order) is a 39-book series with 39 released primary works first released in 1964 with contributions by Terrance Dicks, Ian Marter, Malcolm Hulke, David Whitaker, Philip Hinschcliffe, Philip Hinchcliffe, Bill Strutton, Eric Pringle, Donald Cotton, William Emms, Eric Schlosser, Paul Erickson, Stephen Wyatt, John Peel, Ben Aaronovitch, Paul Cornell, Gary Russell, Eric Saward, Jenny T. Colgan, Robert Shearman, Mark Gatiss, Pete McTighe, Keith Temple, and Phil Ford.