This book will boost your powers of observation, memory, deduction and reasoning using the techniques of the worlds most famous detective. It is packed full of case studies, tests and examples from the original novels. Topics covered include: mind palaces, non-verbal tells, lie detection, intuition concentration, listening, alertness, relaxation, logic, speed reading, people watching, information shifting, and much, much more. You will never look at a shirt cuff, trouser hem or scuff on a shoe in the same way again!