This is not just another counting book. In this book you must look carefully at the pictures. You must count. And count again. This is a counting book with a difference. What is the difference? The difference is what is left over when you subtract one group from another group. Why else is this a counting book with a difference? Because besides counting, you must read and look and think, too. Because there are many things to discover and puzzle out. Because this book is fun
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