This was, alright I guess. Didn't think it was necessary for it to be split into 2 volumes though. The story itself is rather different than the previous ones, since it involved discussions of morality. I don't think the mystery element was as heavy. More plot-driven. A bit too outlandish for me to love, but probably alright for kids (pre-teens).
It ended on a note basically stating there's more to come lmao. TBH, when the main story arc (ended on book 5) was done, I've wondered we'd get more from the evil organization, but the books after were just individual cases, unrelated. This 2-volume story tied back to the group, so now I just hope the spin-offs would be translated as well, bahaha.