9Get ready to give your brain the ultimate mental workout with FUN WITH A PENCIL!, a brand new series of amazing puzzles from the master himself, Richard Manchester. In this ULTIMATE compilation of numerical brain-teasers, you'll find hundreds of puzzles that will keep you busy for hours. From the ego booster to the dauntingly difficult, this collection has something for everyone! But be warned: Sudoku is seriously addictive! So whether you are new to these puzzles or already hooked, you will find this collection impossible to put down. These simple to learn but difficult to master puzzles are perfect for all ages and abilities. So grab your pencil and get ready to take on this compilation of numerical brain-teasers. Open this collection to any page and be prepared to think hard and have fun at the same time!