The Maze of Doom (novel)

 was a novel released in 2020 by BBC Children's Books. It was written by David Solomons and featured the Thirteenth Doctor, Graham, Yaz and Ryan.

Publisher's summary
An ancient artifact buried deep within the TARDIS leads the Doctor back to London, where a deadly predator prowls the tunnels beneath the city. As the Time Lord and her friends investigate, they uncover a mystery that will take them from a secret mountain base to the depths of the ocean - and if they cannot solve it, one of them will perish.

In order to save her friend, the Doctor must solve the riddle of ... the Maze of Doom!

Plot
to be added

Characters

 * Thirteenth Doctor
 * Graham O'Brien
 * Yasmin Khan
 * Ryan Sinclair

Continuity

 * The Doctor's TARDIS is said to have a swimming pool. (TV: The Eleventh Hour)