102 Puzzle Quizzes (Interactive Puzzlebook for E-readers)

100 Puzzle Quizzes (Interactive Puzzlebook for E-readers)

101 Puzzle Quizzes (Interactive Puzzlebook for E-readers)

103 Puzzle Quizzes (Interactive Puzzlebook for E-readers)

104 Puzzle Quizzes (Interactive Puzzlebook for E-readers)

Brain Training And Brain Games for Memory Improvement: Concentration and Memory Improvement Strategies with Mind Mapping (New for 2015)

75 amazing logic riddles and games: Answers just one click away.

The Best of Sudoku: 200 Hand Selected Sudoku Puzzles With Solutions. Four Difficulty Levels From Novice To Elite.

Exercises for the Brain and Memory : 70 Neurobic Exercises & FUN Puzzles to Increase Mental Fitness & Boost Your Brain Juice Today (With Crossword Puzzles)

Interactive Word Find: Easter (Word Find For Kindle)

Riddles: 100 Interactive Riddles and Brain teasers: The Best Short Riddles and Brainteasers With Clues for Stretching and Entertaining your Mind (Riddles ... riddles & puzzles, puzzles & games)