49 books • 8 series
Book #1: Math Puzzles For High School
Book #2: Brain Games For Adults
Book #3: Math Games For Adults
Book #4: Math Games For High School
Book #5: Math Games For Middle School
Book #1: Brain Teasers For Adults
Book #2: Brain Teaser Book
Book #3: Japanese Brain Teasers
Book #4: Brain Teaser Games
Book #5: Brain Teasers For Office
Book #1: Logic Puzzles For Adults
Book #2: Logic Puzzle Book For Adults
Book #3: Logic Puzzle Games
Book #4: Japanese Logic Puzzles
Book #5: Number Logic Puzzles
Book #1: Brain Games Book
Book #2: Killer Sudoku Brain Game
Book #3: Brain Games For Elderly
Book #4: Mind Games Book
Book #5: Mind Games Large Print
Book #7: Math Puzzles For Teens
Book #1: Logic Puzzles For Kids
Book #2: Math Games 3rd Grade
Book #3: Brain Teasers For Kids
Book #4: Math Puzzles For Kids
Book #1: Math Puzzles For Middle School
Book #2: Math Games For Teens
Book #3: Logic Puzzles For Kids Age 10 To 13
Book #4: Brain Teasers For Kids Ages 10-12
Book #5: Brain Teaser Games For Teens