A great idea

Books whose front covers lack pictures and whose titles are in the smallest practicable type. The cover content is a quote from the book. The indications that the books are part of a series are all on the back covers and spines.

Caustic Cover Critic has the story.

The back covers pick up the film motif (all the books were made into more or less famous movies):



Would you buy the book if you were unaware of the source of the quote? if you were aware of the source, would you have to?