Dr. Tenth by Roger Hargreaves

 

The Doctor is on vacation when the planet is attacked by Sontarans.  What will he do when he trapped with one of the invading aliens?

This is one of the Little Men series of books about Doctor Who.  There is a book for each of the Doctors.  As a fan, I found the book to be hilarious.  I would highly suggest it for all Doctor Who fans -- no matter their age.