how machines work

David Macaulay is famous for his "how things work" books. How Machines Work: Zoo Break! is a new book that is really fun. So fun that it took me a long time to get it back from Amanda and Huxley so I could review it. The concept is simple. A story, a simple story, is constructed, that has nothing to do with machines. Except it has everything to do with machines. Two critters, Sloth and Sengi, are in a zoo and trying to escape. Their various escapades lead to situations that allow the exploration of all those interesting mechanical concepts, such as inclined planes, levers and fulcrums and…