Yakuso is a new puzzle game you will have a pleasure to discover! All you need is a pencil, reading the easy rules, using very simple additions, and filling the grid as you solve each step. This book consists of 40 puzzles with growing difficulty from very easy to hard. The last grid needs at least 20 minutes to be solved, whereas the first ones are very easy helping you improve your logical and calculation skills.

Bertrand Leplay is an electronics ingineer graduate and is currently working in the lighting industry as a marketing manager. His long-time interests have been in logical and mathematical games with the first yakuso puzzles published in 2009 in the french magazine Multilogic.