Twenty-four previously uncollected stories from Del Rey's semi-amateur Astounding Science Fiction and Unknown World days (1938-50), strung together with generous swatches of commentary. Unfortunately the cream of the Del Rey crop has long since been skimmed, and what's left is some of the venerable assembly-liner's most forgettable stuff. Much of the science is painfully primitive and the frankly hack plots say an awful lot about the so-called golden age of sf. Del Rey's editorial asides, however, are lively and entertaining -- they amount to an informal literary autobiography and are by far the best written part of this volume.