The tradition of honoring Martin Gardner continues with this collection of articles by those who have been inspired by Gardner to enter mathematics, to enter magic, to bring magic into their mathematics, or to bring mathematics into their magic. With contributions from world-leading puzzle designers, puzzle collectors, mathematicians, and magicians, the book covers card and magic tricks, the history behind given puzzles, mathematically interesting objects involving the number seven, and puzzles for readers to solve. Specific puzzles discussed include tangram, 14-15 Puzzle, seven-coloring of the torus, packing circles, and more.

History and Hoaxes: Sam Loyd's Most Successful Hoax. Numbers and Shapes: The Seven-Colored Torus. A Property of Complete Symbols. Seven-Fold Symmetry in Mathematica(l) Graphics and Physical Models. Seven Knots and Knots in the Seven-Color Map. Seven from the Sea. Seven Staggering Sequences. Seven Water Lilies. Puzzles and Games: Developing the Transmission Puzzle. Triple-7 Hamiltonian Chess. Retrolife. The Logologicomathemagical 7 7 Puzzle. Seven Roads to Roam: A Magical Journey. Fractal Tilings Based on Dissections. Creating the NAVIGATI Puzzle. Crazy Elephant Dance. The Two Ovals-to-Table Story. Folding Regular Heptagons. Combinatorial Philosophy. Variations of the 14-15 Puzzle. Pentomino Battleships. Horses in the Stream and Other Short Stories. A Potpourri of Polygonal and Polyhedral Puzzles. The Hexa-Dodeca-Flexagon. Golomb, Gardner, Benjamin and Jones: Midwives to a Puzzle. Walk, Slide, and Jump. Polyomino Number Theory Developments.