Open Library
Mystery
Every answer hides another question.

A wee Christmas homicide
Kaitlyn Dunnett

The Lost Valley
J. M. Walsh

Cracking open a coffin
Gwendoline Butler

Acceleration
Graham McNamee

Chopping Spree (Goldy Bear Culinary Mystery #11)
Diane Mott Davidson

The body in the moonlight
Katherine Hall Page

The Body in the Attic
Katherine Hall Page

The body in the Big Apple
Katherine Hall Page

Murder carries a torch
Anne George

All unquiet things
Anna Jarzab

Il tesoro Della Nave Vichinga
Elisabetta Dami

Lair of Dreams
Libba Bray

Where Memories Lie
Deborah Crombie

Water Like a Stone
Deborah Crombie

Poison heart
Mary Logue

A tale of Two Castles
Gail Carson Levine

Ruddy gore
Kerry Greenwood

Triple jeopardy; three novels
Philip MacDonald

The Ways of the Dead
Neely Tucker

The Hardy Boys (House on the Cliff / Secret of the Old Mill / Tower Treasure)
Franklin W. Dixon