There comes a point when you've consumed enough stories that you notice similarities. Sure, there are common tropes applied to plots that make them seem similar, but what I'm talking about is when you're reading a book and immediately, you're like, "This is exactly like [FILL IN THE BLANK]." For me, the fifth book in the Dark Tower series, Wolves of the Calla, laid out its premise, and I instantly thought, "This is exactly like Seven Samurai (1954)." Fortunately, there was more to this book than this classic tale of villagers defending themselves with the help of skilled warriors.
I will give credit to Stephen King for taking a well-known plot and adding enough sub-plots to distract from the fact that this book is the Dark Tower equivalent of The Magnificent Seven (1960). This is probably because these sub-plots are the driving force behind the main story arc of the series. As such, the Father Callahan/Black Thirteen thread was a welcome distraction from the training sequences that plague stories that follow the A Bug's Life (1998) formula. It was this sub-plot that makes me excited to read the rest of this series.
All jokes aside, Stephen King's use of the "hired warriors" trope was well written in Wolves of the Calla. It used the already-established western tropes present in the Dark Tower series to present a familiar conflict. It felt fresh and unique despite having seen many iterations over the years. I especially liked the "skilled plate throwers" as it helped enforce the ease at which Gunslingers can adapt to different styles of projectiles with deadly accuracy. It's rare to see a book this late in the series have such a solid plot, but I suspect it is due to this tried-and-true plot.
The Seven Samurai of the Dark Tower series, I give Wolves of the Calla 4.0 stars out of 5.