This is the third book we have read from Taylor-Butler and we have enjoyed them all. They are the perfect level for preschoolers who are just beginning to show an interest in the solar system. Each page has some basic information with wonderful images. There is also a word hunt list at the beginning of the book for things like "orbit", "solar system", etc and I love that the book provides a simple explanation of what each term means. When we read these books my daughter constantly asks "what do that mean?" when we come across a new term. Sometimes I admit to being stumped to come up with a simple enough explanation. The books ends with a short chart comparing things like the length of a year, day, size and number of moons between Earth and Saturn. It always amazes my daughter when she reads about how many more moons the other planets have compared to Earth. This is a great series I suggest for the preschool level.