A brief collection of facts about caves: size, appearance, formation, use, and exploration. By no means comprehensive or cohesive--ice and lava caves are skipped over, information is strung together with no apparent aim--the book does include the more interesting and most fundamental lore. Illustrations work adequately with the text, and descriptions are both helpfully familiar (""Your school and playground could fit into a large cave"") and strained (pirate treasures were hidden in shore caves). The effect of air pressure on cave winds, an unfamiliar concept, is not explained; the wearing down of stone by water is demonstrated--perhaps too simply--by dissolving a cube of sugar. Indifferent and overgeneralized but the youngest cave book available.