From Starbounder - Starbound Wiki
It has 24 storage slots and is stackable.
|The Miniknog restricted our access to books, and we believed them all to be burned.
|Ah, the makings of a glorious library. Books are revered by Avians, though many can not read.
|The Floran share knowledge in blood and bone. A scent speakss more than any booksss.
|Inquisitive. Perhaps there is knowledge here I could use.
|Is the bookcase decorated with gold?
|These books should be shared, knowledge should be free.
|Just a buncha books in a fancy lookin' bookcase.