Alison Carmichael is a hand lettering supremo. This is a self promotional piece, but check out her site to see an abundance of other great work, much of which you'll no doubt have seen around already.

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.