I'd certainly recommend reading the Anderson's fairy tales, Icebella and the melting of her heart for example in KQ5 was inspired by Anderson's 'The Snow Queen'.
Aesop is also a good source for many of the classic fairy tales.
Another great fairy tale collection is Vikram and the Vampire from India. Basically IIRC the story correctly it's basically like 1001 Nights. Vikram is carried away to be killed by a vampire but tricks the creature into sparing through telling various stories.
Of course Rudyard Kipling is often credited with having added important works to the world's library of fairy tales as well.
Washington Irving and some of the American Tall Tales could even be sources of inspiration as well. There are quite a few native American tales that could be good inspiration as well. The 'Fill' bowl in KQ1 for example comes from a classic North American Tall Tall/Folktale called 'Fill, Bowl! Fill!' about a man named Jack.
Roberta also looked to classic literature and horror such as the appearance of Count Dracula in KQ2, Abdul Alhazred in KQ6, and the Headless Horseman in KQ7 (from an American folktale by Irving).
Last edited by Valiento; 04/11/2011 at 11:50 am.