Doctor Who Adventures (in-universe)
- You may be looking for the real-world magazine.
Doctor Who Adventures was a magazine about the television series, Doctor Who. It usually contained stories about the Doctor, among other features.
The Doctor themself, in their Eleventh and Twelfth incarnations, frequently wrote letters to the magazine's readers, welcoming them to the issue and talking about what they could expect within its pages, as well as updating them on their recent exploits. (PROSE: Hello, Time Travellers!, Dear Readers)
History
A "special Christmas issue" was released in December 2012. (PROSE: Hello, Time Travellers!)
Another issue came with an "amazing" advent calendar, which had a monster behind every door. (PROSE: Hello There!)
At some point, the Twelfth Doctor began writing letters to the magazine's readers, the first of which was done at Clara Oswald's urging. (PROSE: Dear Readers)