My son loves the Lemony Snickets’ series, too. It’s not my favorite, but he enjoys books and movies that are dark. They are some of the few books he will read willingly.
I will share that the author’s tendency to define difficult words within the text of the book has taught him several new words. 😉
DH read them aloud, my DS read them to himself, and my DS listened to the audio books incessantly for a while. They are that entertaining to him.