A high-class puzzle book from the bestselling author of Alex's Adventures in Numberland; organised from easy-peasy to ninja level - with stories of puzzle mysteries, histories and scandals along the way this book will make your hippocampus happy.

Are you smarter than a Singaporean ten-year-old? Can you beat Sherlock Holmes? If you think the answer is yes - I challenge you to solve my problems. Here are 125 of the world's best brainteasers from the last two millennia, taking us from ancient China to medieval Europe, Victorian England to modern-day Japan, with stories of espionage, mathematical breakthroughs and puzzling rivalries along the way. Pit your wits against logic puzzles and kinship riddles, pangrams and river-crossing conundrums. Some solutions rely on a touch of cunning, others call for creativity, others need mercilessly logical thought. Some can only be solved be 2 per cent of the population. All are guaranteed to sharpen your mind. Let's get puzzling!

This book is about two things – Puzzles and Mathematics. It talks about how you can model a puzzle mathematically and solve it in an easy, structured and systematic way. So you would not only learn the different mathematical concepts, but also at the same time enjoy solving different well known puzzles. And if that’s not enough, there is a set of interesting puzzles at the end of each chapter, to keep your grey cells ticking. This book not only helps you understand the mathematical concepts in a fun way, but also helps you learn the techniques of solving puzzles in an easy way. So if you like mathematics or puzzles, then you would definitely like this book. This book is recommended for school and college students as it would help them appreciate the practical application of the mathematical concepts they learn as part of their academics. And if you are a serious puzzle solver, then this is the book you are waiting for. Not only does the book teach you the modelling techniques to solve a puzzle, but also challenges you with a set of interesting new puzzles. Written in a simple way, with self-explaining graphical illustrations, this book is a treat.

From triangles, rotations and power laws, to cones, curves and the dreaded calculus, Alex takes you on a journey of mathematical discovery with his signature wit and limitless enthusiasm. He sifts through over 30,000 survey submissions to uncover the world’s favourite number, and meets a mathematician who looks for universes in his garage. He attends the World Mathematical Congress in India, and visits the engineer who designed the first roller-coaster loop. Get hooked on math as Alex delves deep into humankind’s turbulent relationship with numbers, and reveals how they have shaped the world we live in.

Terry Stickels is a master puzzlemaker known for the fascinating variety and many forms of his original puzzles. As in his previous book, Are You as Smart as You Think?, he challenges readers with a mix of narrative puzzles to be solved with logical thinking, number puzzles that demand common sense but not higher math, and his very popular "frame games"-puzzles that mix pictures, letters, and numbers to provide fun for puzzlers of every age.

Conundrum is a mind-stretch. Encrypting idioms into their typographic equivalents, Harry enlivens our everyday language and challenges readers to see that "time after time after time" or, at least, "more often than not" "the writing is on the wall." For fans of word puzzles, sudoku, crosswords, and all manner of mind games, Conundrum offers an artfully packaged, cleverly designed new challenge. Drawing upon, literally in this case, graphic puzzles that he began creating as a child, Harry's developed over 100 witty conundrums for this book that will stretch the mind as well as delight the senses. A member of the Alliance Graphique Internationale, a frequent lecturer and contributor to design discourse, an internationally recognized leader in design, and a founder of Lippa Pearce, one of the UK's most respected design agencies, Harry refines the way we see and communicate. Conundrum achieves nothing less than changing how we understand and interact with language.

If you are looking for the ultimate in logic puzzles that require pure deductive reasoning then this second collection is for you. Even if you are new to logic puzzles, the startlingly simple instructions and crystal clear grids provide an easy introduction to this totally absorbing and intellectually stimulating pastime. Every puzzle is a whodunnit in its purest form with each grid being a scene of crime, each digit representing a potential suspect and each clue providing vital forensic evidence. However, unlike those misleading murder mysteries, there are no lateral-thinking conundrums, no ambiguous instructions, no contradictory revelations and no requirement for specialist knowledge. By determining means, motive and opportunity as well as moving from the possible to the probable to the provable, every 'crime' contained herein can be solved by using pure intellect and reason: all you need is the perception and perseverance to identify and pursue the right line of enquiry.