lord of the rings is by J R Tolkien. not my favorite book but it is the one that set the standard for all fantasy novels that came after it. hell you could even argue that the game dungens and dragons is loosly based on that book. i actually liked the book the hobit better ,which is a prequel to lotr.

as far as rowling on drugs, i dont think so. her books may be a good read, i enjoyed reading them to my daughter, but you dont have to be on drugs to use the ideas that someone else thought up before you. what amazed me about her writing was the amount of research she put into the books