Shush The Librarian
The Sweaty Sock is unique among pirate ships - it has a Pirate Library, full of useful books with titles like: "How To Maroon People The Easy Way", "Pirates - Mad, Bad and Dangerous To Know" and "Keelhauling For Fun".
Shush The Librarian is the maddest pirate on board. Whereas the other pirates are fab at stealing doubloons and treasure, Shush steals only books (especially picture books). Of course he never forgets to take them back.