THE CONCORDANCES OF THE RED SERPENT by WILLIAM MEIKLE
Patty Doyle holds the secret to eternal life, but it may only bring her an early death. Patty is working on a journal of a 14th Century alchemist. But after mentioning it in her blog she gets to the office to find everyone brutally murdered. Now she's on the run pursued by a killer who wants the secret of eternal life it contains.