The DaVinci Code
Robert Langdon and French cryptologist Sophie Neveu work to solve the murder of an elderly curator of the Louvre, a case which leads to clues hidden in the works of Da Vinci and a centuries-old secret society.
--Dan Brown

Holy Blood, Holy Grail
Based on decades of research,  new evidence and dazzling scholarship, this authoritative work uncovers an alternate history of the life of Christ as shocking as it is believable.
Non-fiction.  --Michael Baigent, Richard Leigh & Henry Lincoln

The Last Templar
The action moves back and forth in time between the Templars' last battle and the present-day search for a recently stolen coding device that can unlock the secrets of the Knights Templar.
--Raymond Khoury

The Rule of Four
Trying to decipher an ancient text, two researchers obtain a diary that may contain the key to the code, but when a fellow researcher is killed, they realize that the book contains a dangerous secret.
--Ian Caldwell and Dustin Thomason

The Book of Names
An ancient text reveals that for every generation, there are thirty-six secret individuals whose lives affect the fate of the world.  All but three of the current generation's Hidden Ones have met unnatural deaths.
--Jill Gregory and Karen Tintori

Labyrinth
A volunteer at an archaeological dig becomes a target after discovering a pair of crumbling skeletons, while eight hundred years in the past, the daughter of a crusader must safeguard the location of the Holy Grail.
--Kate Moss

The  Dante Club
Only the few scholars of the Dante Club realize that a series of gruesome killings in Boston and Cambridge are modeled on the descriptions of Hell’s punishments from Dante’s Inferno.
--Matthew Pearl

Daughter of God
A prominent art broker and her husband are drawn into a thousand-year-old web of conspiracy, murder and intrigue, around a female Messiah, a young girl whose existence, if proven, would explode the very foundation of Western culture. 
--Lewis Perdue

Map of Bones
When several people are burned to death during the theft of a religious artifact, Gray Pierce pursues a clandestine fraternity of alchemists who would use the artifact to establish a new world order.
--James Rollins

The Last Kabbalist of Lisbon
A man searches for the killer of his beloved uncle, a renowned kabbalist discovered murdered in a hidden synagogue, along with a young girl. The secret language and codes of the kabbalists at turns light and obscure the way to the truth he seeks.
--Richard Zimler

Revelation
John Reese's daughter lies in a coma, struck down in her Harvard laboratory by late-night intruders. The police are stymied, and Reese decides to look for answers on his own.
--L. Christian Balling

The Book of Fate
A two-hundred-year-old code devised by Thomas Jefferson becomes the key to a present-day conspiracy at the highest levels of Washington and the power elite of Palm Beach.
--Brad Meltzer