The ultimate variety puzzles book for adults comes with a collection of 155 variety brain games and brain teasers that include Akari, Fillomino, Kakuro, Kendoku, Futoshiki, Sudoku and Tatami. These puzzle games have been proven to improve mental clarity and gives your brain a great workout. These variety puzzles range from very easy to very difficult. It is mainly focused on adults but young teenagers with a sharp mind will also be able to complete the brain games thus improving memory and boost mood at the same time.