Just finished my first playthrough with Nate.
And I have to say, I was left rather disappointed with Nate’s playthrough. He did not turn out in the way I would have expected, and in a number of ways I found his interest in our Detective somewhat creepy. His sudden and unannounced appearances, his many lingering stares, his incessant thoughts of the detective, even some of the things he would say made my skin crawl at times. In the end, all of his collective behaviour just seemed to give the impression that Nate was more obsessed with the detective than he was experiencing genuine romantic feelings that could one day become love. Of course, this is just my take on it. Others may feel differently, or perhaps it’s just an aspect of the vampire experience I am not truly appreciating, but it all just rubbed me the wrong way.
But do not take this to mean that I disliked the book. It is certainly a respectable addition to the HG library, though I would say that the first book was better. And despite my uneasiness with the Nate playthrough, I did read it all the way through for the sake of finding out how the story ends. I certainly hope Nate seriously chills out in the next book, and, if he does, I may consider giving him another spot. His calm and collected nature was part of his appeal in the first book, as much as his unfailing kindness was as well.
Though I write this to express my thoughts to others, I also do this because I have the sneaking suspicion that this impression I got of Nate was not what the author may have intended, and therefore may wish to know of it.
I think I will try Mason next. I did like him after getting to know him more in the first book, and he was genuinely nice during the Nate playthrough of the second book. I will probably write more posts another time. 
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@11115 It’s all a matter of taste, honestly. In truth, these books have little to do with detective work or crime mysteries, as all of that stuff is just a backdrop for the real story; the detective’s romantic entanglements with one of four vampires. I would even say the supernatural stuff is another aspect of the backdrop, just one that we explore a little more than the others because it directly effects our vamps.
So, it really comes down to whether or not you are interested in romance stories. If romance is not your thing, I would probably advise you gave this a pass. But, if you are unsure, at least play through the demo (in this case, of the first book) before deciding. And who knows, you may be surprised. I have, a couple of times, approached a book thinking I probably won’t like it, only to read through the demo and find I liked it far more than I expected.
Ultimately, it’s up to you and what you want to do.
If nothing else, it passes the time while we’re all stuck in quarantine. 