Spellhowler

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

Lvl	Skill	From whom	Where	Chance	With premium
40	Curse Fear	Lienrik Lad 40	Field of Silence	0.25%	0.38%
40	Death Spike	Lienrik Lad 40	Field of Silence	0.25%	0.38%
40	Hurricane	Manashen Gargoyle 40	Ivory Tower Crater	0.25%	0.38%
40	Resist Wind	Tamlin Orc 41	Hunters Valley, Aden Territory	0.25%	0.38%
40	Silence	Enchanted Monstereye 41	Ivory Tower Crater	0.25%	0.38%
40	Surrender to Wind	Giant Monstereye 41	Sea of Spores	0.25%	0.38%
40	Vampiric Claw	Tamlin Orc 41	Hunters Valley, Aden Territory	0.25%	0.38%
48	Tempest	Light Bringer 46	Devil's Isle	0.25%	0.38%
52	Curse Death Link	Tanor Silenos Chieftain 50	Tanor Canyon, Giran Territory	0.25%	0.38%
52	Squall	Sanhidro 52	School of Authority, Oren Territory, Aden Territory	0.25%	0.38%
58	Aura Flash	Luminun 58	School of Authority, Oren Territory	0.25%	0.38%
68	Demon Wind	Doom Trooper 66	Field of Massacre, Aden Territory, The Cemetery	0.25%	0.38%
70	Arcane Power	Conjurer Bat Lord 70	Aden Territory, Blazing Swamp, Field of Massacre	0.25%	0.38%
70	Hurricane Armor	Lava Wyrm 70	Aden Territory, Blazing Swamp, Field of Massacre	0.25%	0.38%
72	Wind Vortex	Cindermire Golem 72	Blazing Swamp	0.25%	0.38%
73	Arcane Chaos	Hames Orc Footman 73	Blazing Swamp	0.25%	0.38%
75	Star Fall	Emberspine Lavasaur 73	Blazing Swamp	0.25%	0.38%