6In The Lost World, the first in a series of books to feature the bold Professor Challenger--a character many critics consider one of the most finely drawn in science fiction--Challenger and his party embark on an expedition to a remote Amazonian plateau where, as the good professor puts it, "the ordinary laws of Nature are suspended" and numerous prehistoric creatures and ape-men have survived. "Just as Sherlock Holmes set the standard--and in some sense established the formula--for the detective story . . ., so too has The Lost World set the standard and the formula for fantasy-adventure stories . . .," Michael Crichton writes in his Introduction. "The tone and techniques that Conan Doyle first refined in The Lost World have become standard narrative procedures in popular entertainment of the present day."