When Loomer offers to find Ned and Cookie's missing books, they "catch" him by saying that they never said the books were missing, however just a moment earlier they told Loomer that their books had "mysteriously disappeared" after they returned them.
When Principal Wright is confronting Evelyn and Cook about the school store expenses, when the camera switches to the kids, Wright is wearing glasses, but when the camera switches back, Wright is not wearing any glasses.
Loomer is smarter in this episode due to reading often in the library.
When Evelyn and Cookie were competing for the school store, Cookie said he thought of the idea to sell items at a discount, but it was really Evelyn who thought of it first.
Commercial Announcer: Cookie's Book Store. It's better than Evelyn's!
Buzz: Volunteers are heroes. They sacrifice their time for the betterment of others, and ask for nothing in return. It's because of them the world shines bright, even on it's darkest days.
Crony: So that's what he sounds like.
Loomer: Dude you haven't said anything since we've known you.
Buzz: Everything's been fine up until this point.
Moze: You guys are the worst volunteers in the history of volunteering! I thought we could change something and make a difference and be proud of it. But you guys are incapable and you're losers!
Buzz: She's right.
Moze: Did he just say something? He never says something.
This is the first time that Buzz speaks.
Get your friends to pitch in, it'll be more fun.
Discover new things and make new friends in the library.
Can't find a book? Find out who has it.
Don't wait to get to the library.
A few hours can make a big difference.
In "Library", Ned's undercover disguise with the blonde wig and mustache, as well as the slow-motion walk and music were references to the Beastie Boys music video Sabotage.