First book in a series. 
 Great historical paranormal mystery featuring a former cop now PI and a philologist (from wikipedia: the study of language in written historical sources; it is a combination of literary studies, history, and linguistics). The characters are likeable, the mystery is engaging and the romance is slowly built, with great intimate moments and unexpectedly hot sex. The mystery plot and the romance plot are cleverly interwoven and the conflicts resolution is good. This may become one of my favourite series if the second book holds the promises of the first one.