Catch the Flying Books is a quest that can be found in Lonesome Manor. Madame Leona will request that Mickey catch all of the flying books around the Library. There are two ways to do this.
One is to stand on the rafters and catch them by touching them. The other, more simpler way, is to rescue Gremlin Jumbo and pay him 50 E-Tickets to catch them for Mickey.
Once this has been completed, Madame Leona will reward Mickey with a pin for his efforts.