The book premise is scifi but won some awards for historical accuracy regarding the Jack The Ripper and that time frame in England. You can just read the first book and go away happy. Its a good read and I was able to immerse myself really easily.

Plus its very cheap $3.99. I also read the 2 following books, which were good but not as good as the first. Only 3 books in the series. I dont consider it a trilogy as the story is continuous but not something that is serial like other series.