This anthology is presented as an auction catalogue of 1929, shortly after the events in "The Shadow Over Innsmouth." The feds have just raided the Esoteric Order of Dagon Lodge. Now they've contracted with Pent & Serenade, Occult Auctioneers, to sell the items secured in the raid.  In addition to books, this auction also features weaponry, art, jewelry, nautical items, textiles, and objects both strange and prosaic once owned by the Dagon cult. The design skills of Andrew Leman of H. P. Lovecraft Historical Society have brought the catalogue to life in all its 1920s period glory. Rebecca Baumann of the University of Indiana provided the cataloging of the objects.  Liv Rainey-Smith and Eduardo Valdes-Hevia contributed illustrations. Leading voices in horror and Lovecraftian fiction again contributed essays, including F. Paul Wilson, Jesse Bullington, John Langan, Gemma Files, Livia Llewellyn, Michael Cisco, Nick Mamatas, Ramsey Campbell, Selena Chambers, Silvia Moreno-Garcia, and, in a bittersweet note, Joseph S. Pulver, Sr. (to whom the book is dedicated), in what may be his final piece.

The book was nominated for the World Fantasy Award for Best Anthology of 2024, and Liv Rainey-Smith won the award for her artwork.