Sharpen your brain with these fun challenges! With over 300 fun & varied puzzles, set over six levels of difficulty, & all designed to give you an enjoyable mental workout!  Product Information: •†ISBN:† 9781398813878 •†Author:† Arcturus •†Publisher:† Arcturus Publishing Limited •†Format:† Paperback •†Pages:† 192 •†Dimensions:† 23 x 15 x 1.2 cmÂ