3.5 for the manga version
This is an interesting volume, I've not reread the series in sooooo many years so a lot of it I couldn't remember (like I vividly remember what the Grotesque looked like, but nothing about what it actually does in the storyline)
I do want to just reiterate again - as I have on each volume - that this shouldn't be your first foray into the Saga of Darren Shan. You should 100% read the books first, as the manga can't fully give you the experience the books do. Battle scenes for example are harder to express in a few pictures compared to full paragraphs, and returning characters aren't necessarily easy to recognise because of the style of drawing.