The golden triangle by Maurice Leblanc — cover

The golden triangle

The golden triangle is a mystery novel written by Maurice Leblanc and first published in 1917.

This is an adventure novel starring the famous gentleman thief Arsène Lupin.

The plot revolves around a mysterious artifact known as the Golden Triangle, which is linked to a great fortune and several hidden secrets.

Lupin faces powerful enemies as he tries to protect the innocent and unravel the mystery of the triangle. The story mixes intrigue, action and Lupin's characteristic wit as he uses his cunning to solve the mystery and confront his adversaries.

"It was close upon half-past six and the evening shadows were growing denser when two soldiers reached the little space, planted with trees, opposite the Musée Galliéra, where the Rue de Chaillot and the Rue Pierre-Charron meet. One wore an infantryman’s sky-blue great-coat; the other, a Senegalese, those clothes of undyed wool, with baggy breeches and a belted jacket, in which the Zouaves and the native African troops have been dressed since the war. One of them had lost his right leg, the other his left arm."

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Adventure Mystery Crime Justice Adventure Detective

Public domain (US)·No sign-up·DRM-free·Real text, not scans

Pages
315
Reading time
7 hours 33 minutes
Pace
Intermediate
First published
1917
Language
French

109 years later, still timely

Why Read The Golden Triangle in 2026?

Fast, continental intrigue where wit outruns force. Leblanc blends espionage, romance, and puzzle-box twists with effortless charm.

Today's connection

If you enjoy capers and clever reveals, this is comfort and craft. It sharpens pattern spotting, celebrates nerve without cruelty, and shows how style plus strategy can defuse a heavier world.

Caper craft

Locks, clues, escapes.

Angles & tells

Look twice, win once.

Light bravado

Charm with ethics.

Perfect for Fans of Classic Mystery Arsène Lupin Enthusiasts Readers Interested in Early 20th Century Fiction

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About the author

Portrait of Maurice Leblanc

Maurice Leblanc · 1864–1941

Suave capers and clever twists led by a gentleman thief with wit, nerve, and style.

11 books by Maurice Leblanc in the library →

If this one stays with you…