Of the many journeys the Doctor has taken into our history, few were as odd as those detailed by the Doctor Who Discovers… range, published by Target Books in 1977. Intended to be an ongoing series of educational reads, these slim, 64-page volumes featured the Fourth Doctor ‘discovering’ different topics: Early Man (published 14 February 1977), The Conquerors, Space Travel (both 15 November), Prehistoric Animals (8 December) and Strange and Mysterious Creatures (20 April 1978). Two more were planned for 1978 – The Inventors and The Pirates – but the run was discontinued after just five releases.