The sauropods--that's what they're called, these largest of the large, and Simon memorably tells just how large these dinosaurs were. Clear images (such as larger than a school lunchroom) make information about the lizard-footed creatures stick. Discussing six types--apatosaurus, brachiosaurus, camarasaurus, diplodocus, and the recently discovered supersaurus and ultrasaurus--Simon reports their measurements, eating patterns, herding habits, even their predators, if one can imagine such a thing. Woven throughout is the knowledge of experts, who still make pioneering discoveries in this field. Specific results of their work are listed; young travelers on vacation can check up on the fossils. Large, airy drawings add further accuracy. Sure to be popular for its clarity, accessibility, and Simon's own happy fascination with the topic, this is a delightful addition to the dinosaur collection, and, like the animals themselves, it's big.