Open Library
Mystery
Every answer hides another question.

Sleeping Beauties
Stephen King

Kiss me, deadly
Mickey Spillane

Jung gesellen =
Muriel Spark

Master of the moor
Ruth Rendell

The Hostile Hospital
Lemony Snicket

Skeleton Key
Anthony Horowitz

Snakehead
Anthony Horowitz

Brimstone Wedding, The
Ruth Rendell

Cat Chaser
Elmore Leonard

Running blind
Desmond Bagley

The Lighthouse Mystery
Gertrude Chandler Warner

Indelible
Karin Slaughter

Bad Boy Brawly Brown (Easy Rawlins Mysteries)
Walter Mosley

The clue in the crumbling wall
Carolyn Keene

Pyramiden
Henning Mankell

Baltimore Blues
Laura Lippman

In the Company of Cheerful Ladies (No. 1 Ladies Detective Agency (Audio))
Alexander McCall Smith

Crocodile on the sandbank
Elizabeth Peters

Big Little Lies
Liane Moriarty

The Dark Wind
Tony Hillerman