The first book in this trilogy is Art in the Blood: The only vampire in this book is Jack and, in the other books, the only supernatural characters I've met so far have been related to his making as a vampire. Most stories so far have only that one sup... Jack was a reporter but now has a friend who is a detective and who he works with. Jack has two talents that help him as a detective--his ability to get around locked doors and his powers of hypnosis. Though it is difficult to hurt him permanently, it is not hard to hurt him temporarily and this can be bad for the humans he is protecting. So, suspense exists.
The stories are set in the late 30's Chicago, so gangsters show up in most of the stories as does the "noir" atmosphere of the era. This one centers on the art world and was quite enjoyable (a true mystery that the reader is able to solve along with Jack.) Fun.
In the second book, Fire in the Blood, Jack and Escott are hired to find an expensive bracelet which leads them into 30's Chicago gangsterland (again.) Now, for the first time, Jack encounters the dark side of his nature and is completely frightened by it... Pretty good book.
The third book, Blood in the Water, starts directly where Fire in the Blood ends with gangster problems. And at it's finish, the action is not completely resolved. The next book will start midstream. This book was pretty much entirely about Jack trying to protect his friends from the gangsters who are after him. This is made more complicated by Jack's avoidance of killing anyone (even a gangster who is trying to kill him.) Because Jack is not invulnerable (he can be hurt, he can get knocked out, and it is possible to kill him), these problems are not as easily solved as one would think.
These books were great fun.