Open Library
Mystery
Every answer hides another question.

The Seven-Per-Cent Solution
Nicholas Meyer

The Mystery of the Tolling Bell
Carolyn Keene

While the Clock Ticked
Franklin W. Dixon

Birds of prey
J. A. Jance

The outfit
Donald E. Westlake

Shoot/don't shoot
J. A. Jance

Silhouette in scarlet
Elizabeth Peters

The Hidden Window Mystery
Carolyn Keene

The way we die now
Charles Ray Willeford

The mystery of the ivory charm
Carolyn Keene

The Moonstone Castle mystery
Carolyn Keene

The clue of the whistling bagpipes
Carolyn Keene

The state vs. Elinor Norton
Mary Roberts Rinehart

A ticket to the boneyard
Lawrence Block

The Garden of Eden, and other criminal delights
Faye Kellerman

Death under Sail
C. P. Snow

Street of the five moons
Elizabeth Peters

Star Struck
Val McDermid

Culpa mía
Mercedes Ron

The Housemaid
Freida McFadden