We have added several comic book versions of Doctors ten, eleven, and twelve. So, if you have enjoyed the television series, you might enjoy these.
Two books that I think are really fun for Doctor Who fans are Doctor Who 50: The Essential Guide by Justin Richards, and Doctor Who: The Visual Dictionary Updated and Expanded by Jason Loborik.
Doctor Who 50 gives a history of the start of the show and follows with a section on each of the Doctors through number eleven. It includes information about the actor who portrayed the doctor, the doctor's companions, his foes, and so much more.
Doctor Who: The Visual Dictionary is just what it says, a visual smorgasbord of Doctor Who everything. A Doctor Who fan could spend hours enjoying this book. It even includes a large foldout look inside the Tardis.