Dr Gareth Moore (B.Sc (Hons) M.Phil Ph.D) is the internationally bestselling author of a wide range of brain-training and puzzle books for both children and adults, including Anti-stress Puzzles, Ultimate Dot to Dot, Brain Games for Clever Kids®, Lateral Logic, Extreme Mazes and The Ordnance Survey Puzzle Book. His books are available in over 40 countries, with worldwide sales of over 5 million copies. He is also the creator of online brain-training site BrainedUp.com and runs the daily puzzle site PuzzleMix.com.

Whether you are new to puzzling or simply looking for a new challenge, sharpen your thinking with the number games in this fun – but fiendish – book.

Dr Gareth Moore (B.Sc (Hons) M.Phil Ph.D) is the internationally bestselling author of a wide range of brain-training and puzzle books for both children and adults, including Anti-stress Puzzles, Ultimate Dot to Dot, Brain Games for Clever Kids®, Lateral Logic, Extreme Mazes and The Ordnance Survey Puzzle Book. His books are available in over 40 countries, with worldwide sales of over 5 million copies. He is also the creator of online brain-training site BrainedUp.com and runs the daily puzzle site PuzzleMix.com.

Whether you are new to puzzling or simply looking for a new challenge, sharpen your thinking with the number games in this fun – but fiendish – book.

Dr Gareth Moore (B.Sc (Hons) M.Phil Ph.D) is the internationally bestselling author of a wide range of brain-training and puzzle books for both children and adults, including Anti-stress Puzzles, Ultimate Dot to Dot, Brain Games for Clever Kids®, Lateral Logic, Extreme Mazes and The Ordnance Survey Puzzle Book. His books are available in over 40 countries, with worldwide sales of over 5 million copies. He is also the creator of online brain-training site BrainedUp.com and runs the daily puzzle site PuzzleMix.com.

Whether you are new to puzzling or simply looking for a new challenge, sharpen your thinking with the number games in this fun – but fiendish – book.