Doctor Who: Target Books is a 28-book series with 28 released primary works first released in 1964 with contributions by David Whitaker, Nigel Robinson, Ian Marter, Bill Strutton, William Emms, Paul Erickson, Eric Schlosser, Donald Cotton, Terrance Dicks, Malcolm Hulke, Barry Letts, Philip Hinchcliffe, Philip Hinschcliffe, James Goss, Gareth Roberts, Christopher H. Bidmead, Eric Saward, Stephen Wyatt, and Paul Cornell.