I knew nothing of Jack Reacher before starting this book, except for a trailer with Tom Cruise which I barely remember, so I didn't have a clue what to expect. What I got was... predictable in some ways, less so in others. 
 I completely get the appeal. Great action scenes, very (VERY) well written as well. The plotline is complex but the author makes sure we don't get lost (and it doesn't feel condescending either). 
 However, personally, I wasn't entirely convinced. I didn't get attached to the characters, and especially not to Reacher himself. I didn't mind him, I'm just not that fond of him, which might be a little bit of a problem down the road given that the series is primarily about him. I did like his "voice" though - but the excerpt from the next book showed that it was written with a third-person point of view, which reduces the appeal. 
 I did like Finlay though. 
 So, to sum it up: a series of books which do seem interesting, but I'm not sure I really want to read more down the line.