The Caltraps of Time is David I. Masson's only published book of fiction, a collection of short stories, most of which made their first appearance in New Worlds SF during the 1960s under the legendary editorship of Michael Moorcock. An apocalyptic battle at the edge of the unknown, the deadly fascination of voracious magma, a world where the weather expresses itself as mood. These are only some of the themes tackled with superb scientific speculation by David I. Masson.