@GoddessFish, @Archaeolibrary, @GameOverStation/, #YoungAdult, #Fantasy, 5 out of 5 (exceptional)
Plague Arcanist is the fourth book in the Frith Chronicles and you really do need to read them in order. The question should be "Why wouldn't you?" This is an amazing fantasy series with amazing characters and abilities, set in a world that will take your breath away!
I'm not giving out any spoilers when I say Volke is infected with the plague. Not only does this happen at the end of book three but the very title sort of gives it away!