00764cam a2200229 4500 547800404 TxAuBib 19981208120000.0 981208s1985||||||||||||||||||||||||eng|u 9780525441618 0525441611 TxAuBib Sleator, William. Singularity / William Sleator. 1st ed. New York : E.P. Dutton, 1985. 170 p. ; 22 cm. Sixteen-year-old twins Harry and Barry stumble across a gateway to another universe, where a distortion in time and space causes a dramatic change in their competitive relationship. 19981208. Twins Fiction. Science fiction.