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Title: Machines of war
Review: I bought this book for my middle schooler as a present, and it has become the cornerstone of his research into building both a trebuchet and a catapult for science fair projects. There are some sketchy spots in the instructions where you have to read into the instructions to get proper locations for attachments, but nothing that can't be worked out with a little creativity. We will see what the finnished products are like. Overall though it is an easy read and enjoyable for my teen age son.
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