You have the reluctant-hero archetype, Sam Black, a private dick with supernatural abilities. As the blurb reads, he is cynical, a loner, and doesn't know there are others out there with varied abilities. He comes in contact with Angles; both fallen and renegade, other sups, and even regular old humans.
This read is on the short side. It completes a story-line; leaving plenty of story to tell. However, the length leaves me wondering if Book Two should have been included on this run to make a well-rounded, lengthy novel vs. shorts for a series. I figure price-point will factor into continued readership.
There are several typos in the book - stuff that you'll find with line-by-line editing (sword vs. word, missing articles, etc.). Those aside - and they don't distract heavily from the read - the book flows well.
This book launches what, in theory, would be a four-book set as the Four Horseman are at play with the game of world control in motion. Sam (not Samuel) ends up growing a bit and he starts to become a better version of himself, in my opinion.
So - detective supernatural with angels and demons and the fight to save humanity. If that is your cup, it is a fun drink. 4 of 5 stars. From the Publisher:
Sam Black is a private detective with a cynical life view and a hidden psychic gift. He believes himself a lone oddity until a renegade angel named Alleam appears in his office. It turns out Sam isn't the only one with the supernatural at his fingertips; there are more, and they're fighting a literal battle between heaven and hell. Sam's role? Help Alleam stop the Apocalypse.