Adventures of the Second Doctor is a 43-book series with 43 released primary works first released in 1974 with contributions by John Peel, Steve Lyons, Jon de Burgh Miller, Gerry Davis, Simon Guerrier, Roland Moore, Justin Richards, Terrance Dicks, Mick Lewis, Ian Marter, Christopher Bulis, David A. McIntee, Peter Ling, Timothy X. Atack, Andrew Cartmel, Eddie Robson, Stephen Baxter, Martin Day, John Dorney, Colin Brake, Jonathan Morris, and Malcolm Hulke.