Ratliff does a great job turning just the story and facts of a Swedish bank heist into an incredibly engaging and suspenseful thriller. If I hadn't read the description, I probably never would have guessed this was actually a work of non-fiction. And to me, that's how you mark a great book in this sort of genre.
It was definitely thoroughly researched, and the narrative is well pieced together. There's even a photograph of some of the buildings, characters, and scenery at the end of every chapter. This was definitely a nice touch, and you'll appreciate actually being able to see things like the roof of the bank where the heist took place.
As far as reading time, it took me about an hour at a pretty leisurely pace, and I'm not a fast reader. I think this was a great length though for this story. It's certainly a page turner, but it wouldn't have hurt to have more detail in a few places. You'll enjoy it if you're looking for a good, engrossing short read.