Description
Condition - Very Good
The item shows wear from consistent use, but it remains in good condition and functions properly. Item may arrive with damaged packaging or be repackaged. It may be marked, have identifying markings on it, or have minor cosmetic damage. It may also be missing some parts/accessories or bundled items.
The Writer's Guide to Creating a Science Fiction Universe
How-to-do-it reference shows SF writers how to use science to create plausible, imaginative and self-consistent worlds. Describes contemporary science, plus scientific conventions already established.