Good evening- 

Just looking to to some substantial weeding in the non-fiction section of the library due to the fact that so many of these books rarely go out and we'd like to reconfigure our space to turn it into a meeting space/collaboration area for multiple classes, etc. Also would love to be able to increase the room we have for our Makerspace.  The question I have is if there is a requirement as to the number of non-fiction books that remain in a library.  I vaguely remember something about it, but clearly don't remember the details.  Any help or insight would be greatly appreciated!