Not really spoiler BUT, the way the author tried to insert vampires into big historical events was sloppy. The black plague was actually vampires? Thats a dang stretch.
Also this was 90% exposition and talking about vampires and 10% plot (which all occurred in the last few chapters).
The romance is a mating thing so no actual build up. Just bam, your obsessed with this person. Not in love, obsessed. I liked the idea but the execution left me disappointed.