To start with let's get one thing out of the way: yes it was an improbable storyline. So if you're looking for naturalism, look elsewhere. But the whole point about a good thriller is that it should be about the suspension of disbelief. And this book certainly delivers. A cat and mouse struggle, twisting this way and that, it has tension all the way. Kaylie reminded me in some ways of Lisbeth Salander (in Stieg Larsson'sThe Girl Who Played with Fire (Millennium Trilogy)et al. But this is not a flaw, just my personal reaction to the character. The cat and mouse struggle also reminded me of the cyber battle of wits between Andi and "Llanosea" in David Kessler's legal/psychological thrillerNo Way Out.