“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