The Official Doctionary

 was a reference book by Justin Richards aimed at the younger reader with short paragraphs on a range of topic that are organised under various categories written from the viewpoint of the Eleventh Doctor referencing the more recent years of Doctor Who, from Rose 2005 up to The Big Bang in 2012.

Publisher's summary
The Doctor likes to talk. A lot. About anything and everything and frequently about things that make no sense to mere human brains. Here he explains some of the trickier concepts of time, space, Time Lord technology and the mysteries of the universe. This Doctor's dictionary is invaluable for budding time travellers and intergalactic companions.

Contents

 * Introduction by the Doctor
 * Space and Astronomy and Stuff
 * Time and Relative Dimensions in Space
 * Science and Technology Things
 * Now Get Out of That
 * Nice and Helpful "People"
 * Not So Nice "People" and Aliens and Monsters and Things
 * People – and Aliens and Whatever – who are Sort of Nice Sometimes. You know?
 * Organisations and Groups
 * Spacestations and Space Bases and So On
 * Have You Visited...?
 * Hats and Other Cool Accessories
 * Miscellaneous Humany-Wumany Type Stuff
 * Myths and Legends

Notable features

 * All entries were fully illustrated by photographic images.
 * This title only included a handful of entries from 'classic' Doctor Who these included a picture of an early Cyberman fromThe Tenth Planet (under 'Cybernetics'), Sharaz Jek (under 'Androids'), BOSS (under 'Computer'),K1 (under 'Robot'), Alistair Lethbridge-Stewart, the Brigadier, the Eight Legs (under 'Spiders'), The Abominable Snowman, and the Loch Ness Monster, Omega, Totters Lane, Skaro and previous incarnations of the Master and the Doctor.
 * Having appeared on-screen in Rose 2005 – the BBC television show Blue Peter has a reference that includes the line “They even made a Slitheen spaceship once – brilliant!”
 * This hard backed BBC Children's Book title was edited by Jason Loborik and designed by Jason McEvoy, and priced £9.99 (UK).