The Serpent’s Egg by Caroline Stevermer, Ace Books, 1988, mass-market paperback. ISBN 0-441-75912-2
https://www.audiobooks.com/promotions/promotedBook/403954/grand-tour-or-the-purloined-coronation-regalia?refId=137336
Representation: Bridget Smith, JABberwocky Literary Agency, Inc.