"Walter Jon Williams really knows how to play power chords in the 'key of wonder' and in Implied Spaces he's gone to town on the guitar solo!"—Charles Stross"Implied Spaces pioneers a new genre of SF—- the 'Sword and Singularity' novel. Williams combines fantasy tropes believably with nanotech, bleeding-edge infotech speculation, classic smashing-planets space opera, and intriguingly human, or possibly post-human characters along with a fast-moving plot and a quirky sense of humor in a melance that's cosmological, theological, ontological, comic, and thoroughly entertaining."—-S.M. StirlingThe mysterious swordsman Aristide wanders the multiverse with his talking cat Bitsy, both of them in search of the "implied spaces," the accidents of architecture in a world that is itself artificial and created by a supreme intelligence.While exploring the pre-technological world of Midgarth, Aristide discovers a plot that threatens to shake the multiverse to its foundations, a sinister enemy intent on laying all humanity in his thrall. Aristide must surmount war, plague, death, the loss of love, and cosmic havoc in order to finally confront the enemy, whose secret brings all reality into questions . . .