puzzle mathematics

New York Times All the Crosswords That Are Fit to Print - (New York Times Crossword Puzzles) by The New York Times (Paperback)

Brain Games - To Go - Who Done It? Puzzles - by Publications International Ltd & Brain Games (Spiral Bound)

How to Think - Creative Thinking Puzzles - by Charles Phillips (Paperback)

The Sunday Times Jumbo General Knowledge Crossword Book 6 - (Sunday Times Puzzle Books) by The Times Mind Games & Peter Biddlecombe (Paperback)

New York Times Beginners' Luck Easy Crosswords - (New York Times Crossword Puzzles) (Paperback)

The New York Times Large-Print Crossword Puzzle Omnibus Volume 8 - Large Print by Will Shortz (Paperback)

Symbolic Logic and the Game of Logic - (Dover Math Games & Puzzles) by Lewis Carroll (Paperback)

500 Difficult Chess Puzzles with Multiple Moves, Part 2 - (Winning Chess Exercises) by Charles Morphy (Paperback)

The New York Times Fitness for the Mind Crosswords Volume 1 - (New York Times Crossword Puzzles) by Will Shortz (Paperback)

The New York Times Crosswords for a Relaxing Vacation - (New York Times Crossword Puzzles) by Will Shortz (Paperback)

Tesla Puzzles - (Sirius Classic Puzzles) by Barry R Clarke (Paperback)

The New York Times Will Shortz Presents Fun in the Sun Crossword Puzzle Omnibus - (Will Shortz Presents...) (Paperback)

New York Times Crosswords to Keep Your Brain Young - (New York Times Crossword Puzzle) by Majid Fotuhi (Paperback)

Second-Degree Black Belt Sudoku(r) - (Martial Arts Puzzles) by Frank Longo (Paperback)

Sudoku Challenge - (Puzzle Challenge) by Roland Hall (Paperback)

New York Times Games the Best Friday Crosswords: 100 Hard Puzzles - (Paperback)

Puzzle Mania - by Sanjay Pappu (Paperback)

New York Times Easy to Not-So-Easy Crossword Puzzle Omnibus, Volume 2 - by Will Shortz (Paperback)

Wordsearch - (Sirius Elegant Puzzles) by Eric Saunders (Paperback)

Crosswords - (Christmas Puzzle Collection) by Eric Saunders (Paperback)

The New York Times Sleepy Sunday Crossword Puzzles - by Will Shortz (Paperback)

The New York Times Easy as Pie Crossword Puzzles - (New York Times Crossword Puzzles) (Paperback)

The New York Times Piece of Cake Puzzles - (Paperback)

The New York Times Monday Through Friday Easy to Tough Crossword Puzzles Volume 7 - (Spiral Bound)