Well they shouldn't end up having the problem that HBO did w/ Game of Thrones and running out of books to base a season on. There must be more than 30 Reacher novels.
Add that it’s a lot less expensive to produce and they could be making years of them!
So at one season a book, I'd be 82 when the series runs out.
#27 is on the way, and the books are now being cowritten...so they'll probably keep milking this cow for forever. The last couple have been awful though.
Assuminga) that you live that long and b) that no more new books are written.
I haven’t read No Plan B yet, but I have read Better Off Dead. I thought it was fine. There is the standard Reacher plotline of the near insurmountable problem, the unlikely mystery, in the eventual physical solution, but that has been Reacher since day one.
I've definitely gotten diminishing returns on the most recent books, but I haven't read anywhere near all of the catalog, so I can slowly pick my thru some of the older novels.
I believe I’ve read them all except for no Plan B. I also benefited from some serendipity in that while searching for Lee Child books I stumbled onto Lincoln Child, and especially his work with Preston. That led me to the Gideon’s sword novels and the to Relic and the Pendergast novels. Most recently I went back and picked up there early works, Thunderhead, Riptide and The Ice Limit. It is an interesting and interconnected world, yet which novel stands on its own. I recommend them if you haven’t read them.