All of the mind bending puzzle books have been carefully compiled to give the reader a refreshingly wide range of challenges and puzzles, some requiring only a small leap of perception, others deep and detailed thought. All four books share an eye catching and distinctive visual style that presents each problem in an appealing and intriguing way. Do not, however, be deceived; what is easy on the eye is not necessarily easy on the mind. The book includes transformation puzzles, word circles, fill in the blanks activities, left and right change challenges, codes to crack and a lot, lot more. My favourite puzzle is the one where you have two words and you change the first letter and put it in the blank square; if you get all of the words right then you can see a new word with the blank spaces.