A big idea can change the world, for what is the world as we know it, but ideas? It starts small, inside the mind of one person, who grapples with it, tries to fully understand it, articulate it into words to share with another mind, who will poke and it, test it, expand it. Some of them wither and die under scrutiny, and others balloon with importance and have the power to change the world as we know it. Democracy. Germ theory. And in the case of The Book of Lost Hours, the manipulation of time.

This book is a wonder. Any book about time is going to bend our ideas of a timeline, and this one plays with the strings of time beautifully, skillfully, coherently, it will have you enthralled. This is a page turning thriller with so much heart and intellectual stimulation it will grip you and not let go until the final dang sentence.
It’s also the kind of book with twists and turns and the simple joys of small discoveries. With that, I don’t want to spoil one detail of the plot for those of you who go on to read this, which I very much recommend you do. It is marketed as a mashup of The Ministry of Time and The Midnight Library and I could not come up with a better description of this impressive novel.
Hayley Gelfuso, you are a genius and I think I will pick up anything you put down. Also, what do you mean this is a debut novel. Masterful work. Thank you, sincerely, for writing this fascinating book.
Note:: I received an early copy of this book from the publisher through netgalley in exchange for an honest review. All opinions are my own.
Details
Title:: The Book of Lost Hours
Author:: Hayley Gelfuso
Genre:: Sci-Fi/Fantasy Romance
Publisher:: Atria Books
Length:: 400 pages
Audio Length:: 13h 41m
Audiobook Narrator:: Carlotta Brentan
Published:: August 26th, 2025
The Litertarian Rating:: 5-Stars
If you liked this book, check out…
The Ministry of Time | Kaliane Bradley (review coming soon)
The City in Glass | Nghi Vo
The Gravedigger’s Almanac | Oliver Potzsch