A new entry in the lengthy Lets-Read-and-Find-Out series explains what causes tornadoes, describes them and the damage they can do, and gives some forthright safety measures. Except for the implication that the phenomenon is limited to the US, the text is admirably authoritative and clear. Maestro's illustrations, employing the deep, rich colors of pastels--especially well-suited to the drama of these violent storms--appropriately extend the text. A useful, attractive book.