This was the first Boggle book that I bought. I absolutely love them because I enjoy the challenge of making as many words as I can. The book starts with a simple 4x4 block of letters and has about 36 lines that you can use to make words. The challenge to me is to try to make double that amount. After a certain amount of the 4x4 grids, they increase to 5x5, 6x6 and then there are a couple of 18x18 grids in the end. Also, on each page there are special "Brainbusters" for you to find. They give the clues and then you have to find the words. Some are easy, some require a bit more thinking. It's great brain exercise. This is a great puzzle book to have during a lunch break, waiting at the doctors/dentist office, recuperating from an illness/surgery, during a trip or waiting on transportation for the trip or just relaxing at home or even in the park. If like to have fun with letters and words then you will enjoy Boggle Brainbusters.