1959- 21stcentury adventureandadventurers alaska animals asia biography campgrounds caves cavingaccidents chapterbooks children'sfiction disasters discoveryandexploration eastsouthcentral(al etc extraterrestrialbases fiction guineapigs hamsters hide-and-seek history illustratedchildren'sbooks juvenilefiction juvenilenonfiction kentucky klimchuk ky mammothcave mice michaelray ms nature outdoorskills parks people places psychology reader recreation science searchandrescueoperations socialscience south speleology spelunkers sports stone survival taylor thenaturalworld tn) travel unitedstates