- You may be looking for The Doctor Who File.
The Doctor Who Files were a series of hardback titles from BBC Children's Books published by the Penguin Group from 2006 to 2008.
All of the titles in this range have a hexagonal cut out in the cover, through which can be seen the featured character (or topic) on the inside page. They are numbered on the spine. Aimed at young readers, each title is lavishly illustrated with photographs and broken down into small sections of text under various heading with every other page (almost), having a gate-fold (fold out page) "Test your Knowledge" sections of five multiple choice questions based on the preceding prose. Every title in this series featured a new short prose story.
All fourteen issues were collected in The Doctor Who Files Collector's Edition. The short stories were collected in The Doctor Who Stories, as well as Speech Day, a short story original to that collection. Most of the stories were also reprinted in the 2015 omnibus paperback Heroes and Monsters Collection. Only Speech Day wasn't published in the Heroes and Monsters Collection.
An additional story, Speech Day by Justin Richards featuring the Saxon Master, was not printed in this book series, but was later included as a bonus in the Doctor Who Stories omnibus.
