4.35 avg rating — 1,219,199 ratings

"Courage in differences and strength in uniqueness. Courage to be kind."

4.42 avg rating — 6,519 ratings

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4.57 avg rating — 2,654 ratings

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3.92 avg rating — 397 ratings

"The whole series is great for problem-solving, proactive boys."

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4.34 avg rating — 2,574,165 ratings

"We can work to understand others."