London and Glasgow: Collins' Clear-Type Press, 1920. First UK edition. Hardcover. 277pp. Octavo [19.5 cm] Light blue cloth over boards with a gilt stamped title on the spine, and an embossed title on the front cover. The edges of the spine and covers are mildly bumped, and the covers are faintly bowed. The spine is barely perceptibly faded. There are large areas of darkening on the endsheets, and there is a previous owner's name on the front pastedown. From the collection of Berkeley book collector and letter press printer, John Ruyle. In Day, Supplemental Checklist of Fantastic Literature. Item #37924
Collins' Fiction Library. The character, Craig Kennedy, a professor of chemistry, is continuously responsible for developing new forms of weaponry and transportation, making medical breakthroughs, and forging super-metals and chemicals, among other things.