Sounds like it might be fun then! He's a little more explosive than the other two but he also never really got completely out of the mindset of YAY KNOWLEDGE. We'll just have to find a way to reveal Aziraphale's not just a bit of an odd acting mortal, which I'm sure we can somehow pull off..

Book collections are not for selling they are for reading, the sale sign is just an invitation for other people to drop off their unwanted tomes.