When you buy this book you get an electronic version (PDF file) of the interior of this book. CalcuDoku is a fun and addicting logic puzzle game that combines S

When you buy this book you get an electronic version (PDF file) of the interior of this book. Futoshiki is a fun and addicting logic puzzle game that combines S

When you buy this book you get an electronic version (PDF file) of the interior of this book. CalcuDoku is a fun and addicting logic puzzle game that combines S

When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving CalcuDoku 9x9. After solving all the pu

When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving CalcuDoku 9x9. After solving all the pu