You can enchant written book up to level 32767

The game, through the use of a mod, allows to enchant books up to the level 32767. I don't know how it works, but here's the Source Code and the download of this dangerous mod. It also works in multiplayer and in servers where you are not OP or in gamemode.

Download:
(1.4.2) http://www.mediafire.com/?k1hiqhhaxhmg1gc
(1.3.2) http://www.mediafire.com/?mq3pv35j3hvb402
(src) http://pastebin.com/LUd6Eg4k

Sorry for my English, I'm Italian.

Good afternoon,
Futurz.