I don't know if I'm just bad at using this, but it appears to only check Booktastic books instead of the Book Club list. Either that or it doesn't work on the general store, I'll keep testing and change the rating if it seems to work later.
Just took a look at the general store and it's a different layout, so you're right that the extension doesn't work there. If you take a look at the Magical Bookshop, Brightvale Books, etc you should be able to see it. Works for the main list only and not Booktastic (yet).
I'll update the description to specify; thanks for the catch!
