One of the earliest and best of Winston's line of juvenile science fiction novels of the '50s (which turned me into a lifelong sf fan). This was Chad Oliver's first novel, a classic time travel tale. 208 pages, with that great Alex Schomberg end paper illustration. Bumped cover corners, three short splits along right side of spine, some spine end wear, some black staining on covers, several page corner creases, moderately toned pages. And, regretfully, lacking the dust jacket. But ok binding with no gutter splits.