TheBestseller
Observatory

Best Sellers · 2020s · 2025

September 2025

#1 bestsellers each week.

Week of September 7, 2025

2025
QUICKSILVER
Callie Hart
Cover of QUICKSILVER

Hardcover Fiction

QUICKSILVER

Callie Hart

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2025
THE ANXIOUS GENERATION
Jonathan Haidt
Cover of THE ANXIOUS GENERATION

Hardcover Nonfiction

THE ANXIOUS GENERATION

Jonathan Haidt

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Week of September 14, 2025

2025
KATABASIS
R.F. Kuang
Cover of KATABASIS

Hardcover Fiction

KATABASIS

R.F. Kuang

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Week of September 21, 2025

2025
KATABASIS
R.F. Kuang
Cover of KATABASIS

Hardcover Fiction

KATABASIS

R.F. Kuang

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2025
SISTER WIFE
Christine Brown Woolley
Cover of SISTER WIFE

Hardcover Nonfiction

SISTER WIFE

Christine Brown Woolley

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Week of September 28, 2025

2025
THE SECRET OF SECRETS
Dan Brown
Cover of THE SECRET OF SECRETS

Hardcover Fiction

THE SECRET OF SECRETS

Dan Brown

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2025
CONFRONTING EVIL
Bill O'Reilly and Josh Hammer
Cover of CONFRONTING EVIL

Hardcover Nonfiction

CONFRONTING EVIL

Bill O'Reilly and Josh Hammer

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