Deep Down is… acceptable. It is really short, and still has all the hallmarks of a Jack Reacher novel. You get a mystery, some action, and Jack coming up with answers that you could have guessed but probably didn’t.

On the other hand, it felt like 75% of the story was spent on preamble and set up. The detective work and action unfolds extremely quickly and is over in a few pages. The ending is equally abrupt.

In summary - eh. I mean it’s a fine waste of an hour or two, but it’s just an appetizer.