Hal Clement:

The Essential Hal Clement from NESFA Press:

Volume 1: Trio for Slide Rule and Typewriter (collection of the novels Needle, Iceworld and Close to Critical)

Volume 2: Music of Many Spheres (collection of 17 short stories, including most from Small Changes and from The Best of Hal Clement)

Volume 3: Variations on a Theme by Sir Isaac Newton (collection of all Mesklin stories except Close to Critical: Mission of Gravity, Star Light, Lecture Demonstration and Under; also the how-to-write-science-fiction article Whirligig World)

First edition hardcover -signed/