You can find a list of adaptations of fairy tales in Books and More with the phrase "Fairy tale adaptations" as a Subject search
Articles in encyclopedias, especially scholarly subject encyclopedias, can be very helpful in establishing basic information about a person, place, event, or theory and they often have bibliographies that list additional resources worth consulting.
Search for concise and original introductions to a wide range of subjects. These short books are written by experts in the field and cover everything from Vatican II to the Civil Rights Movement to Medical Ethics. Note: Only 5 users may access this database at one time. (Oxford)