Even with my love of sub-clauses and punctuation, "With this book, you, too, can be a mystery solver!" just seems too much - especially for a back cover that is supposed to grab people's attention.
Sorry to sound harsh, but my suggestion is that you should send your two books to professional publishers, with an open and optimistic mind. Take on board their comments, because they really do know what sells, and how to sell it.
fine = 0.004 x daily income x (V2 - V2lim) with V in kph
But applying this to the ordinary geezer on £100 a day doing 130 kph in a 120 kph limit gives, coincidentally, the same £1000 as before. Maybe it's proprtional to the cube of fourth power of the speed or possibly to income above a certain level. But then if you were poor you'd have no fine at all. I can't make sense of it It's all bollocks and obviously quite beyond the innumerates at the Grauniad, a paper I read BTW.
(Duj) Of course there is and they never catch me despite a tendency to leg it. But it depends on the fine. Speeding on a motorway (say 85 mph instead of 70) is hardly arson, rape and bloody murder, except maybe in Switzerland, a very well-ordered country.
Haven't I anything better to do? Well, just tonight, no, alas.