Arcane Tomes

Arcane Tomes are magical focuses and determine which of the magical abilities available in the game that your character can use. Each class has a different number of available Tomes, but the spells for each are the same. There are six Tomes sorted into two groups, Blue and Red. The Blue grouped magic types are associated typically with righteous judgement while the Red group is more focused on the more interrogative techniques.

Paladins can learn the first two ranks of any two of the Blue magics, Thieves can learn up to three ranks in both one Blue and one Red and Priests can learn all ranks in two Blue and one Red.

(I do not know if you can acquire or unlock more Tomes during the game. These are the numbers of Tomes that each class has access to at the beginning of the game.  I will update as discovered.)

Ranks
Novice rank can be learned by all three classes and requires 1 skill point, 1 point of Intelligence and a character level of 1.

Student rank can be learned by all three classes and requires 6 skill points, 18 points of Intelligence and a character level of 15.

Initiate rank can be learned by the priest and the thief and requires 11 skill points, 38 points of Intelligence and a character level of 35.

Magister rank can only be learned by the priest and requires 16 skill points, 60 points of Intelligence and a character level of 45.

Divine Magic
Novice rank: Bless, Endurance, Solid Faith

Student rank: Raise Dead, Healing Touch, Lightning Protection

Initiate rank: Divine Mercy, Holy Ground

Magister rank: Transubstantiation

Magic of Miracles
Novice rank: Insight, Word of an Angel, Blade of Fire

Student rank: Locust Swarm, Levitation, Salvation

Initiate rank: Sacrifice, Halo

Magister rank: Archangel's Power, Divine Wrath

Magic of True Faith
Novice rank: Frost Protection, Cure Disease, Purge

Student rank: Protection, Shield of Faith, Dispel Magic

Initiate rank: Lightning, Exile

Magister rank: Spiritual Shield, Pillar of Salt

Inquisitional Magic
Novice rank: Sixth Sense, Open Wounds, Curse

Student rank: Light, Blinding, Cruxifiction

Initiate rank: Stoning, Invisibility

Magister rank: Stigma, Turn to Ashes

Heretical Magic
Novice rank: Confusion, Fear, Breath of Death

Student rank: Astral Attack, Swarm of Flies, Vampirism

Initiate rank: Decay, Plague

Magister rank: Instant Death, Dance of the Dead

Pagan Magic
Novice rank: Overdose, Keen Senses, Poison Protection

Student rank: Stoneskin, Berserker, Shatter

Initiate rank: Storm, Regeneration

Magister rank: Ball of Lightning, Rain of Fire