Uploaded now version 0.1.15 and updated some books.
Changelog:
* Fixed Weaponmastery (bonus discipline)
* Fixed some bugs with the arrows
* Fixed: you can carry more than one quiver

Please update the package before playing book 6 (else you'll get some script errors).
I added a command in the menu to restart the current book.
If you were playing book 6 with version 0.1.14 maybe you should restart it with the new package (fixed problems with arrows, bow and quivers).