"A creepy and dazzling new page in Fran Wilde's Gem Universe." --Max Gladstone, New York Times bestselling co-author of This is How You Lose the Time War

"A glittering tale of academic jealousy and ancient artifacts, The Book of Gems is a pulse-pounding adventure." --Katherine Addison, author of The Goblin Emperor

"The Book of Gems is a story full of atmosphere and wonders leading us along an unsettling path to ask: how do you see the truth when you are certain you already know it? Fran Wilde brings us there with an adventurous, suspenseful story delivered with compassion and a steady hand." --C.L. Polk, Nebula and World Fantasy Award-winner

"Sparkling with ancient mystery, rediscovered family, and magical history, The Book of Gems is a gripping story. Fran Wilde delivers a tale filled with compassion and dire warnings." --Jodi Meadows, New York Times bestselling author

"Even those new to the series will be swept up in Wilde's inventive worldbuilding. This is a bite-size treat." --Publishers Weekly

"Wilde delivers again. Every facet of this story shines." --Kevin Hearne, author of the Seven Kennings trilogy

"Recommended for fans of moody aesthetic academia or fantasy mystery." --Library Journal

Praise for Fran Wilde's Gem Universe series:

"A splendid tale of courage and transformation in a world as exquisite as Wilde's prose. You will be utterly entranced." --Ken Liu, Hugo, Nebula, and World Fantasy Award winner, on The Jewel and Her Lapidary

"Readers who loved Jewel will be delighted by this outing." --Publishers Weekly, on The Fire Opal Mechanism

"A fun adventure, one that's beautifully written." --io9, on The Jewel and Her Lapidary

"[A] sharp, glittering novella about friendship, family, loyalty, and mental instability." --Locus, on The Jewel and Her Lapidary