From publisher blurb:
Libram of Silver Magic provides you with new arcane magic options for your OGL fantasy system game. In its pages you will find:
Prestige class versions of the specialist wizards, each with its own unique class abilities to give more flavour than simple bonus spells.
Prestige class versions of the wizard and sorcerer, with class abilities that emphasize the wizard's studiousness and the sorcerer's energy.
The new mage base class, with its Spell Chain Mastery ability, granting new abilities based on groups of related spells known by the character.
The alchemist prestige class, an arcane spellcaster with the ability to create many wondrous things, including philosopher's stone.
Elemental infused classes, new feats and magical substances, and more!