15 books in series

The New Adventures of Sherlock Holmes by Titan Books

The New Adventures of Sherlock Holmes by Titan Books is a 15-book series with 15 released primary works first released in 2011 with contributions by Guy Adams, James Lovegrove, George Mann, Cavan Scott, Mark A. Latham, Philip Purser-Hallard, and Tim Major.

Sherlock Holmes the breath of God
Sherlock Holmes: The Stuff of Nightmares
Sherlock Holmes: Gods of War
The Spirit Box
Sherlock Holmes: The Thinking Engine
The Patchwork Devil
A Betrayal in Blood
The Labyrinth of Death
Cry of the Innocents
The Red Tower
The Devil's Dust
The Vanishing Man
The Manifestations of Sherlock Holmes
The Back-to-Front Murder
Masters of Lies