Despite the rave reviews all over the Internet, this book is the sort of thing that gives coincidence a bad name. The entire setup revolves around the most unlikely (statistically verging on simply impossible) set of relationships existing between those in a bank at the moment a hostage situation develops.
I reached roughly the midpoint of the book before concluding that either the author either was trolling his audience and having a great laugh at our expense, or was just completely incompetent.
I don't throw books away - any books - so I leave tosh like this on the wall of the front garden for passers by to take if they want.