Longbooby

Longbooby was an original Doctor Who novel written by Marky Marc. Published in Chad Books' Old Adventures range, it was the last of that range to feature the Seventh Doctor.
The novel Longbooby is most notably famous for featuring a conversation between Chris and The Doctor, discussing the fact that the latter has eaten all the cheese. 
Other, rather minor famous things about the novel are the fact that it is mad expensive and the first the elaborate that Timelords reproduce by Looms.