Open Library
Mystery
Every answer hides another question.

Deadfall
Lyndon Stacey

Cam Jansen and the First Day of School Mystery (The Cam Jansen Series)
David A. Adler
Dead Letter (Herculeah Jones Mystery)
Betsy Cromer Byars
Night and the city
Gerald Kersh
Warrior's Cross
Madeleine Urban
Mortal stakes
Robert B. Parker
The Stranger in the Mirror
Liv Constantine
A Christmas Secret
Anne Perry
Muertos incómodos
Subcomandante Marcos
The Apeman's Secret
Leslie McFarlane
Martin Misunderstood
Slaughter, Karin/ Knight, Wayne (NRT)
The book stops here
Ian Sansom
Freezer Burn
Joe R. Lansdale
Folly
Laurie R. King
Four to midnight
Scott Flander
Get real
Donald E. Westlake
The Last House on Needless Street
Catriona Ward
The Mystery of the Chinese Junk
Leslie McFarlane
Cold is the grave
Peter Robinson
Everybody dies
Lawrence Block