Michael Holt

Michael Holt wrote several original "interactive" Doctor Who works for younger readers in the 1980s, most notably the four Doctor Who Quiz Books. He has written more than 100 books and also hosted the TV series Mathemagical on the BBC.

Doctor Who Quiz Book series

 * Doctor Who Quiz Book of Dinosaurs (1982)
 * Doctor Who Quiz Book of Magic (1983)
 * Doctor Who Quiz Book of Space (1983)
 * Doctor Who Quiz Book of Science (1983)

Find Your Fate series

 * Crisis in Space (1986)