Physics for the Inquiring Mind

Physics for the Inquiring Mind by Eric M. Rogers was a book which Roberta Tovey read in preparation for the role of Susan in Dr. Who and the Daleks, so as to teach herself about the "Theory" behind TARDIS. (PROSE: Lady Penelope Investigates the stars of the Sensational new film Dr. Who and the Daleks!)

Behind the scenes
Susan herself is introduced reading this same book (which actually exists in the real world) in the first shot of Dr. Who and the Daleks.