Think your mental muscles are in a good shape? Here’s a true test of your reasoning strength and agility - 75 utterly original and totally tantalizing brainteasers from master puzzler GEORGE J.SUMMERS.

SUMMERS finds fascinating challenges in situations as common as game of tic-tac-toe or tennis, or as strange as a land of habitual truth tellers and liars. Whether he is dealing with seating at a party, scoring in a game of darts, or picking winners in a race, summers constructs a perplexing mystery, the solution to which dangles just out of reach, waiting for the logical leap which brings the answer, and then of course you’ll find a selection of straight murder mysteries – a victim, a perpetrator, some clues and a perspective puzzler to sort it out – that’s you!

If you are stuck, don’t worry – there is a helpful solution – scheme for every brain teaser and detailed answers that show you step-by-step how each teaser or puzzler is unraveled.