Acquainted with the night

"A woman's quest for the truth...A medieval icon that holds the clues...And an ancient book with the power to shake Christianity-and humanity itself. London tour guide Caroline Clifford has never believe in vampires- until her uncle is brutally murdered at a Bulgarian archaeological site, and a vampire hunter who corresponded with him seeks her out. Strange anagrams on her uncle's passport lead them to a cliff-top monastery in Greece, where a shattering revelation connects a relic Caro inherited to an age-old text on immortality-and an enigmatic prophecy that pits the forces of darkness and light in a showdown that could destroy all they know..."@en
"Caroline Clifford's bland life as a London tour guide flips upside down when her beloved uncle is brutally murdered at a Bulgarian archaeological site. While traveling to recover his remains, she meets a man who corresponded with her uncle. Jude Barrett is a biochemist on a mission to eradicate the world of vampires."@en
"When her uncle is murdered at a Bulgarian archaeological site, London tour guide Caroline Clifford meets a biochemist who had known him and who, believing that vampires are involved, joins her on a dangerous quest to find the truth."