I've heard Housewright do author-events a couple of times and he's one of the most entertaining authors to hear speak (Jess Lourey is the undisputed best.) Housewright is a 'pantser' and proud of it: he has many amusing stories about his plot lines that dead-end, run-amok, become unsustainable, etc. Ha-ha, no matter how much he practices his craft, he doesn't get any better.
The make-it-up-as-you-go style shows here. The basis for the plot--a guy got killed--starts with a very common contrivance, namely, that the police are inactive/unconcerned/busy. Otherwise the cops solve the case and there is no story.
As Mac investigates, the plot twists come as they do from 'pantsers': randomly and without much sense. If you can keep suspending your disbelief, the book provides an exciting ride, as Mac confronts gangsters, cops, and shady characters.
But Mac's investigation isn't satisfying. He's not just smart, he's omniscient. If it would be convenient to know what the bad guys are saying, then Mac goes to a guy who supplies CIA-grade listening devices. If it would be convenient to know the associates of one bad guy, then Mac taps a friend in the police to make unauthorized use of the police database (again, too bad the police don't investigate murders--they could discover the same easy facts.)
If the bad guys are going to shoot at Mac, he's packing his gun. If they're just talking tough, he doesn't have his gun. Every step feels like paint-by-numbers: Mac always makes the correct choice, always draws the correct inference, no matter how ridiculous, (a shoe print! they wear shoes! I saw a shoe store on main street, therefore the bad guys used to be in the shoe business.)
What we want in a mystery is a detective who uses his brain, who draws conclusions from skimpy evidence that are plausible, and thus solves a crime that others would not be able to solve. At the highest level, a mystery allows the reader to draw inferences from the evidence a moment or a page before the detective, giving the reader the feeling of being a detective. Sadly, Housewright achieves very little of this.