Hey there. Fellow librarian here. I'm the manager of Collection Development at my library, and we have a growing collection of RPG books.
First, I'd look at the pocket editions of the game if you're on a budget. You can get away with the 2E Core Rulebook for everything a player and GM needs (except for a bestiary). If you want the absolute current version with all the errata, look for GM Core, Player Core, and Monster Core.
The Starter Set is useful if your library circulates board games. There are enough fiddly components that you can't just put it on the shelf and expect it to circulate with your normal book collection.
Also, Paizo has been very friendly with libraries. If you contact them, they may even donate a collection of titles to you. I know they're trying to expand Pathfinder Society into library events, so they may be willing to send you some goodies.
Feel free to message me on here if you need any more information from a professional standpoint.
Best of luck!
First, I'd look at the pocket editions of the game if you're on a budget. You can get away with the 2E Core Rulebook for everything a player and GM needs (except for a bestiary). If you want the absolute current version with all the errata, look for GM Core, Player Core, and Monster Core.
The Starter Set is useful if your library circulates board games. There are enough fiddly components that you can't just put it on the shelf and expect it to circulate with your normal book collection.
Also, Paizo has been very friendly with libraries. If you contact them, they may even donate a collection of titles to you. I know they're trying to expand Pathfinder Society into library events, so they may be willing to send you some goodies.
Feel free to message me on here if you need any more information from a professional standpoint.
Best of luck!