Reasons to keep reading: Johnny has a gambling problem, so there's an interesting and sobering aside on the mechanics of gambling addiction. I quite enjoyed the fact that Lowell is wealthy, and he made his money in the stock market by using astrology. There are spots of humor, especially with Lowell's secretary, and they were good touches.
Things that make you close your eyes: Johnny develops a crush on the much older and more sophisticated Lowell, and there's an awkward moment or two as his daughter, Melinda, seems to sanction it. Although the book is written in the third person, the only character who is fleshed out is Lowell. It's classic amateur sleuthing meets political thriller meets My Fair Lady, and the mishmash is dizzying.
There's a lot of potential for turning this into an interesting series. Had Johnny's swearing not been so graphically portrayed, the story would have been smoother and better defined. Or, conversely, maybe everyone else should have been harder-boiled.