So I just finished up Failure Frame Book 8. If you're familiar with the anime, that goes up to the end of book 4. And there's not a whole lot to distinguish it from other "my isekai power is so weak" series, especially when stuff like Arifuerta exists.

But the books are definitely better than what the anime shows. First, the book has a lot of inner monologue for the MC which doesn't translate well to animation. Also, the book fleshes out all the characters of class 2-C more. You start to learn all of their motivations and backstories whereas the anime just gives you a sneak peak. And in Book 8? It was like everything exploded. Dynamics changed, lines were drawn, secrets were revealed.... my mind was blown. And it wasn't cheap gimmicks or deus ex machina either. Everything in the previous books seemed to come together and some of the biggest surprises weren't even from the MC!