Doctor X in an Amazing Adventure in Space
From Tardis Wiki, the free Doctor Who reference
Doctor X in an Amazing Adventure in Space was the first book ever published about the television series, Doctor X, released in 1964. Andy Hansen and Erimem travelled back to 1964 to track down a copy of the book. The book would become incredibly rare and occasionally sold for around 400 quid on eBay in 2015. (PROSE: In Search of Doctor X)
Behind the scenes
With Doctor X serving as an equivalent to Doctor Who within the Doctor Who universe, Doctor X in an Amazing Adventure in Space is a clear analogue to the serial Doctor Who in an Exciting Adventure with the Daleks, the first ever Doctor Who novel which was published in 1964.