If you like The Da Vinci Code by Dan Brown
Here are some other books that I think you may like:
Angels and Demons by Dan Brown.
World-renowned Harvard symbologist Robert Langdon is summoned to a Swiss
research facility to analyze a cryptic symbol seared into the chest of a
murdered physicist. (This story was written before/takes place before
The Da Vinci Code).
Tamar : A Novel of Espionage, Passion, and Betrayal by Mal Peet.
In England in 1995, fifteen-year-old Tamar, grief-stricken by the
puzzling death of her beloved grandfather, slowly begins to uncover the
secrets of his life in the Dutch resistance during the last year of the
Nazi occupation of the Netherlands, and the climactic events that
forever cast a shadow on his life and that of his family.
The Historian by Elizabeth Kostova.
A young woman discovers an ancient book and a cache of old letters in
her father's library, and thus begins her adventurous quest for the
truth about Vlad the Impaler, a search that will span continents and
generations, and a confrontation with the darkest powers of evil.
Foucault's Pendulum by Umberto Eco.
This complex psychological thriller chronicles the development of a
literary joke that plunges its perpetrators into deadly peril. The
narrator, Casaubon, an expert on the medieval Knights Templars, and two
editors working in a branch of a vanity press publishing house in Milan,
are told about a purported coded message revealing a secret plan set in
motion by the Knights Templars centuries ago when the society was forced
underground. As a lark, the three decide to invent a history of the
occult tying a variety of phenomena to the mysterious machinations of
the Order. Feeding their inspirations into a computer, they become
obsessed with their story, dreaming up links between the Templars and
just about every occult manifestation throughout history, and predicting
that culmination of the Templars' scheme to take over the world is close
at hand. The plan becomes real to them--and eventually to the mysterious
They, who want the information the trio has "discovered." (description
from Publisher's Weekly).
The Dante Club by Matthew Pearl.
Set in Boston in the year 1865, the Dante Club, a small group of
literary genuises, prepares the final work on America's first
translation of the Divine Comedy. Their plans come to an abrupt halt,
however, when a series of murders occur in a form adopted from Dante's
Inferno and its unique account of punishment in Hell. With lives
endangered and Dante's literary future at stake, the Dante Club must
shed its reclusive existence so the killer may be caught.