Reverse Method
Here’s an interesting technique. Take a look at your books, go to a library or bookstore and try to figure out how someone came up with the idea for a particular book. Is it a parody? Does it solve a problem? Taking advantage of a fad or collectible? Keep some of the previous ideas generating techniques in mind while you browse. Choose your favorite books and try to find some techniques. You may even discover a new technique of generating a book idea that you can use again in a different subject area.