Thresher

This is another ocean horror, and my second in a row from the author. 
This novel uses a bigeye thresher specifically, and I was really interested as to what the author was going to do, as they are not considered a threat to humans like whatsoever. They do however, get their name from their thresher (or scythe) like caudal fin, which they use to literally whack and stun prey, so I figured there was definitely room to make it scary. Oh and as the synopsis boasts...the author also decided to make it 40ft long which is about double its full size!
The author did a good job with tackling the issue I posed above. There is not only a reason why it's so large, but there is also a reason why it's attacking and being so territorial. I won't say more to avoid spoilers, but this horror is definitely dipping its toes in the realm of science fiction. 
This one is also kind of heavy on the cop stuff like Megalodon: Bloodbath (and others like it, like Jaws), but it takes a bit of a different approach this time. A renowned cop takes the job at a coastal precinct after some unfortunate downturns at his previous employer. His new partner, and the person he's training, takes on this kind of found family/friendship trope but it's done well. 
Personally a 4/5* for me.