A sort of cop procedural only with a little bit of low-level magic in it as well. Our protagonist has a mom from Sierra Leone and a dad from London and he’s a newish police officer, decent at the job but in over his head with this new “Wait, magic is real?” realization. As the reader, you get swept along trying to figure it out at the same time as he does. And the general cop plot has to do with a local slightly-magical crime, but also settling some disputes with the beings who oversee some of the magical elements of the Thames. A great story and one in a longish series. Glad I picked it up, was fun to read when my partner was on a London vacation especially.