Includes bibliographical references (pages 251-256) and index.
Ch. 1. Elementary my dear Watson -- Ch. 2. 'And you do addition?' -- Ch. 3. Bell ringing and other permutations -- Ch. 4. A procession of permutation puzzles -- Ch. 5. What's commutative and purple? -- Ch. 6. Welcome to the machine -- Ch. 7. 'God's algorithm' and graphs -- Ch. 8. Symmetry and the Platonic solids -- Ch. 9. The illegal cube group -- Ch. 10. Words which move -- Ch. 11. The (legal) Rubik's Cube group -- Ch. 12. Squares, two-faces, and other subgroups -- Ch. 13. Other Rubik-like puzzle groups -- Ch. 14. Crossing the rubicon -- Ch. 15. Some solution strategies -- Ch. 16. Coda: questions and other directions