SCIENCE FICTION ADVENTURES IN DIMENSION

Third in a specialized series (Possible Worlds of Science Fiction and Invaders of Earth) this concentrates on ideas with no tangible proof, but not proved impossible, of time travel and parallel worlds, dimensional concepts and science fantasy. Divided into present to future, present to past, past to present and future to present sets of tales, the latter part is devoted to yarns of coexistent worlds. The time machines, spatial extensions, mad situations, etc., are competently handled by Sturgeon, Leinster, del Rey, Bradbury, Padgett, Asimov, and others. The accent on the clock and the calendar makes this more than a routine collection.