I will have you know that that book is classified as a novel, not a novella, so you go ahead an upgrade that achievement.

I love Jackson, and it's on my to-do list to read all of her works, but I'm going to have to skip that one because I just cannot with the child harm.

While I haven't read the novel, I've read all about it in the context of researching Jackson, so I know what happens and that Jackson leaves the murderer ambiguous. Who do you think killed the toddler? Is it the guy who commits suicide or someone else?