Hard Harder and Hardest Puzzles

About The Book

The puzzles in this book will only get more challenging the longer you play. A progressive game will push you outside of your comfort zone. You grow better when you're tested and that means mental development. You will notice that your logical thinking and creativity will improve as manifested by the speed of solving. Get a copy today!
Piracy-free
Piracy-free
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Assured Quality
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Secure Transactions
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