With A Tangled Skein (Incarnations Of Immortality) [first edition]

When the man Niobe loved was shot, she learned that she had been the target, in a devious plot of the Devil's. Hoping for revenge, she discovered, too late, how intricate his scheming was, and that he had managed to trap her son and her granddaughter, Luna. Niobe's only chance to save them was to accept a challenge by the Prince of Deceit--a challenge to be decided in Hell and in a maze of Satan's devising!