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  1. 27 Challenging Brain Teaser Books And Puzzles That Will Keep

  2. The Ultimate Brain Games And Puzzles Book For Adults: Tricky But …

  3. The Best Puzzle Book for Adults: Popular Word, Logic, and Math …

  4. 25 Very Best Puzzle Books for Adults | Book List | Abakcus

  5. Logic Puzzles for Adults: 50 fantastic logic puzzles plus 50 bonus ...

  6. 101 Brain Teasers for Adults (with Answers) - Parade

  7. Puzzle Books: Brain Teasers & Logic Puzzle Books - Barnes & Noble

  8. The Ultimate Brain Games And Puzzles Book For Adults: Tricky But …

  9. 105 Challenging Riddles for Adults (With Answers) - Good …

  10. The Ultimate Brain Games And Puzzles Book For Adults: Tricky But …