Suguru 4: Compact Logic Puzzles That Boost Focus, Deduction, and Brain Power

Suguru 2: Compact Logic Puzzles That Boost Focus, Deduction, and Brain Power

Suguru 5: Compact Logic Puzzles That Boost Focus, Deduction, and Brain Power

Suguru 1: Compact Logic Puzzles That Boost Focus, Deduction, and Brain Power

Suguru 3: Compact Logic Puzzles That Boost Focus, Deduction, and Brain Power