With Miss Norton's usual skilled writing, solid construction and sympathetic characters, [Operation Time Search] is a pleasure to read and to recommend. It begins when a government project's attempt to break through to an alternate world accidentally projects photographer Ray Osborne thousands of years back in time. In this distant era, Atlantis is a powerful but evil nation, now at war with Mu, whose people worship the purity of the Flame…. There is little here of the provocative speculation, insight or satire which characterizes the best adult science fiction, just a good moralistic adventure story (with a slightly surprising end) in which the righteous Murians are pitted against the evil rulers of Atlantis. (p. 134)

Margaret A. Dorsey, in School Library Journal (reprinted from the September, 1967 issue of School Library Journal, published by R. R. Bowker Co. A Xerox Corporation; copyright © 1967), September, 1967.

Miss Norton's extraordinary imagination is again at...