You will be playing as Don Ketype. Examine and interact with everything to get a feel for the game.
Enter the library and talk to the Librarian, Buzz Kervan. After talking to Buzz, grab the thing in front of the door and give it to Buzz.
At some point you get to control Buzz.
This is the low-spoiler guide for "Miskatonic Library" puzzle in Gibbous - A Cthulhu Adventure. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.