The novel “Apollo 23” by Justin Richards was published for the first time in 2010.

When the Eleventh Doctor and Amy Pond stumble upon an astronaut in a space suit in a mall, they suspect that something strange is happening. By using the sonic screwdriver, the Doctor finds a quantum displacement and the two travelers take the Tardis to go to the Moon to investigate. There they find a secret base.

Nobody could think that there may be intruders on the Moon so the Doctor and Amy can easily pass for a scientist accompanied by his assistant. Their help seems needed because the quantum displacement equipment isn’t working properly. The Doctor discovers that someone sabotaged it and that’s just the first oddity.