Bibliographic record and links to related information available from the Library of Congress catalog
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1. The Builders 1 2. Builders Change the World 26 3. You Don't Need Brains to be a Builder 58 4. Who's in Charge Round Here? 92 5. From One Nest to Another 121 6. Two Routes Lead to Trap Building 147 7. The Magic of the Tool Users 180 8. Beautiful Bowers? 216