The 23rd Jack Reacher novel will be called... PAST TENSE.

Here's what Lee had to say about it:

“It’s about the past, it’s a current day story with Reacher looking back into the past because he’s passing by this place in New Hampshire that he recognises from old paperwork as his father’s birthplace. And so he thinks oh well you know I’ll spend a day, I’ll go take a look, maybe find the old guy's house or something. He gets into town and there’s no record whatsoever of anyone called Reacher ever living there.”