HomeThrillerMr. Penumbra's 24-hour bookstore

Cover of Mr. Penumbra's 24-hour bookstore

Thriller · 2012 · G

Mr. Penumbra's 24-hour bookstore

by Robin Sloan

A mysterious San Francisco bookstore, a centuries-old secret society, and the world's most important font

ForAll agesGenreThrillerLength288 pagesRead time~7 hoursCommunity ratings0

This analysis was generated by AI from publicly available reader reviews, literary criticism, and book discussions. It has not been verified by a BookLens community reviewer and may contain errors. Be the first to verify →

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What's in this book, at a glance — five things readers want to know before they start.

Violence

None

No violence

Language

Barely any

Mild language

Sexual Content

Barely any

Mild romantic interest; sweet and non-explicit

Substance Use

None

Casual social drinking among young San Francisco professionals

Emotional Intensity

Barely any

Mild: light mystery and puzzle elements; no distressing content

What this book is about

Clay Jannon takes a night-shift job at the strangely lit Mr. Penumbra's 24-Hour Bookstore, where mysterious customers borrow enormous coded volumes and never buy anything. When Clay begins to investigate, he discovers a centuries-old puzzle involving a Renaissance-era typographer, an immortality cult, and the tension between ancient wisdom and modern technology. Robin Sloan's charming adventure is warm, inventive, and deeply affectionate about books, friendship, and the way ideas survive across time.

Notes for sensitive readers

Reader-flagged moments and themes that may affect your experience.

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