The Monsters Inside (2005) by Stephen Cole is the second in the Doctor Who New Series Adventures novels, and takes The Ninth Doctor and his companion Rose to the Justicia System, a huge 26th Century prison system spread over six planets that houses prisoners from Earth’s colonies.

Upon landing on the planet, The Doctor and Rose are immediately taken into custody and separated, and they spend the rest of the book trying to find each other. Rose is taken to a human-only youth detention centre that is frequently described as a “borstal” and her time spent there is very much Orange Is the New Black but with a sinister twist — some of the warders are not who they say they are and, in what is supposed to be a secure facility, kids are going missing seemingly at random. Meanwhile, The Doctor is taken to a for-profit scientific labour camp called the SCAT-house (dodgy name, I know — it stands for Species-led Creative and Advanced Technologies) and put to work on solving major scientific problems. Although he isn’t willing to help at first, he eventually reveals himself to be the brains of the bunch and has a scientific breakthrough, unwittingly advancing the plans of Justicia’s secret rulers. (Minor spoilers below.)

The Clockwise Man (2005) by Justin Richards is the first of the Doctor Who New Series Adventures novels that were initially released alongside the reboot of Doctor Who in 2005. The Ninth Doctor and Rose land in 1924 to visit the British Empire Exhibition in London, and instead find themselves running (as always) headfirst into danger, on the hunt for a mysterious assassin. After a case of mistaken identity — and multiple run-ins with a zombie cat — the plot thickens as they learn that some of their new friends may be lying to them. But which ones, and why? (Minor spoilers below.)