Gr 3-4–This series suffers from simplicity, misconceptions, and errors. Chapter spreads include a bold-face paragraph introducing the machine and are loaded with brightly colored stock photos–some are action shots–that depict a variety of the machines in each category. Additional data is presented as captions to smaller photos. Each chapter has an “Incredible Fact” box. The titles have a variety of problems. The “Stats & Facts” sidebars are not always consistent in content from one chapter to the next. Race Track, for example, lists most engine sizes in liters or ccs, but the dragster is listed in gallons. The stylized font of some captions is hard to read. These books do not warrant purchasing.