Are you a secret genius? Test and reveal your IQ with this 28-day puzzle programme.

Most people think IQ is fixed. This book shows that your score might not change overnight, but your performance can in as little as 15 minutes a day. Bestselling puzzle author Dr Gareth Moore will guide you through a four-week challenge, designed to train your grey matter and reveal your hidden intelligence across the five pillars of IQ testing, improving pattern recognition, logic, working memory and speed.

Featuring over 150 timed puzzles and short daily sessions, this structured puzzle programme will take you through four specially designed weeks of brain training, from warm-ups and confidence-building puzzles through to skill-building and multi-step thinking. By week four, your intelligence will be put to the ultimate test to see if you have what it takes to be a genius.

With a weekly check-in to track your progress, and with puzzles gradually increasing in difficulty each week, this is the ultimate brain-boosting programme to train and reveal your IQ.