Tyrant

3 books. Every source is listed: one book often drops from several monsters and at different chances.

Lvl	Skill	From whom	Where	Chance	With premium
70	Fortitude	Conjurer Bat 69	Aden Territory, Blazing Swamp, Field of Massacre	0.25%	0.38%
70	Riposte Stance	Cindereye Basilisk 72	Blazing Swamp	0.25%	0.38%
75	Final Secret	Hames Orc Overlord 75	Blazing Swamp, Aden Territory	0.25%	0.38%