I'v never ever saw wolf skin episode or read this book.So I would like to go with "the girl who cried monster".It has a happy ending!

I've only read "How To Kill A Monster" but i've seen Werewolf Skin so ya i picked How To Kill A Monster.

That book ended with them defeating the monster but then they are srounded by the monsters relatives and we don't find out if they escaped or defeat the other monsters but that might be hard because there's more of the monsters and two of them so they don't have much of a chance against them and other book I've never read only heard of it so in my opinion that one has the better ending