You are sure to enjoy this lovely, versatile book.  Like many sticker books, it contains a center section full of several pages of stickers, but in many other ways it is really set apart from "other" sticker books:
1.  The stickers are not clip art.  They are the wonderful full-color photos for which DK is famous.
2.  Each sticker has a description beneath it.  The pages on which the stickers are supposed to be place have slightly different descriptions and are organized differently.  This means that the child has to do a bit of thinking in order to find the correct spot for each sticker.
3.  There are several extra stickers for the child to use as he wishes.
4.  The stickers are re-positionable.

When the book is completed and all of the stickers are put in place, it becomes a beautiful, photo-illustrated book full of fascinating information about space, space exploration, the solar system, etc.  Of course, the price is reasonable enough that many customers simply read through the book then use the stickers to decorate notebooks and projects.  Either way is tons of fun and very educational!