Maybe it's because I'm a sucker for good design, but I find I can't help judging Penguins' books by their covers.

The publisher have revealed their dark sides by putting together another series of books, 'Gothic Reds', with the theme this time being horror. The ten novels feature a set of wonderfully designed covers that manage to tie in the books as a series, but still represent each story individually.

Penguin's Great Ideas is a series of books that contain works that are considered to be world-changing; influential and inspirational.

This is another superbly designed set of covers from Penguin that I'm sure will attract readers who otherwise wouldn't have thought to give works by Nietzche, Freud or Camus a chance.