If you decide to read this book, stick your tongue deeply into the inside of your cheek and keep it there. This story is not to be taken seriously. It's just the foundation for a series of comic slapstick scenes in the book's second half. Without the late-arriving comedy, this would be a two star book.
The book opens with a mysterious telephone call from Bill Barnaby ("Wild Bill" thereafter) to his sister Alexandra ("Barney" thereafter) which is interrupted by a woman's scream and a disconnection. Concerned about her brother, Barney overcomes her fear of flying to leave Baltimore for Miami to find out what's happened. When she arrives, it doesn't look good. Brother Bill is gone, his apartment has been ransacked and evil-looking characters are looking for him. The bright spot is that NASCAR star Sam Hooker is also looking for Bill who seems to have taken off with Sam's yacht. While Sam sticks close to Barney to find Bill (and explore her potential as a girl friend), Barney makes rapid progress in solving the mystery.
Since you must know Stephanie Plum, it's good to draw contrasts here. Barney is much more competent than Stephanie and gets good results from being street smart rather than lucky. She's also ambivalent about the hunky men around her, but in a more restrained way than Stephanie is. Barney isn't nearly as funny. So the book has to rely on slapstick situations to develop its humor rather than drawing off of Stephanie's inherent zaniness.
The book's plot is also intended to be a serious one -- the world is at stake so humor doesn't work in quite the same way.
The book just reeks of not being credible. Things fall together much too conveniently. Why bother to have complications if they aren't complications? I felt like Ms. Evanovich was getting paid by the word.
Because of that, the first half of the book is just like a slow, delayed introduction of Barney and Hooker. If the book had started about in the middle, I would have enjoyed the book much more. As it was, I almost didn't keep going until I got to the better part in the second half.
With Ms. Evanovich's great popularity, I think we can assume that there will be a second book. So you'd better read this one so the second one will make sense. Since that book can pick up with the characters and their relationships established, it should be a much better book. At least I hope it will be.