9780877959670 | William Morrow & Co, February 1, 1989, cover price $18.95 |
About this edition: When David Harrington, an experimental physicist, discovers that pieces of our universe can be exchanged for another, he and his two sons are stranded in another universe and murderous thugs conspire to steal his secret
9780380710270 | Reprint edition (Avon Books, June 1, 1997), cover price $6.99 |
About this edition: When David Harrington, an experimental physicist, discovers that one piece of the universe can be exchanged for another, he and his two sons become stranded in an alternate universe, pursued by murderous thugs who conspire to steal the secret of his discovery.