Kids love Life of Fred Books because they're funny.  Parents, Teachers, and Librarians love Life of Fred Books because they're educational.  Horrible Ray endorses Life of Fred Books for Grades 2 and up.  Life of Fred 2-Book Set : Geometry, Geometry Answer Booklet.  Also, be sure to search Amazon for : Life of Fred Elementary Set # 1, Life of Fred Elementary Set # 2, Life of Fred Set # 1, Life of Fred Set # 2, Life of Fred Set # 3, and Life of Fred Set # 4.  Horrible Ray, Horrible Books, Horrible University