General

It does list all except for Maple Warrior. It is because of this that I now ONLY need maple warrior and nothing else. (hint: get EVERYTHING, MWHAHAHAHHAHAHA)

Short answer: Yes
Long Answer: yes yes yes

Yes, I used it.

any book in the special mastery book counts as the "20" and the "30", so you only need one to get the mastery from 10->30

I think it lists all but the Maple Warrior skill.
Yes, it is a 100% book, though you'll need at least 5 points into your skill before you can use the Special Mastery Book.