Each photo in this unique book comes from the acclaimed George Eastman House archive, so they make stunning art as well as absorbing brainteasers. You'll get two versions of the picture side by side; they'll look almost alike, but one is slightly different from the other. It's up to you to find the variations. Three levels of difficulty with images of historical figures, famous buildings and more. Paperback, 160 pages.

Four Brainbusters in one. The pack is composed of a Sudoku Cube– a representation of the brain busting game, but in 3D! Twist and turn the rows on the cube so that on each face the numbers 1 to 9 each appear only once. Also included is Cube Words, where the aim is to arrange the letters on each cube face so that valid three-letter words are created horizontally and vertically through the central letter and along both diagonals. There is a Snake Cube where you must line up the squares to make an unbroken snake that winds around the entire cube, and finally a traditional twisting Colour Cube. Each cube measures 5cm x 5cm x 5cm. Set of four.