So your first problem is that Novice doesn't equip books and therefor a book weapon sprite doesn't naturally exist.
Novice Job:
Ãʺ¸ÀÚ
Book Sprite:
Ã¥
If this weapon item placement is intentional and you are meaning to create a book that even a Novice can wear, then you need to fill the clientside void of the lacking resource file(s).
Which can be done a few ways;
Copying and renaming an existing weapon sprite.
Copying an existing weapon sprite but making it blank.
Finding someone to make a book weapon sprite for your book weapon.