D&D 4 - Arcane Power

Arcane Power follows on from Martial Power as the second 4e character splatbook. It focuses on the warlock and wizard from the Player's Handbook, on the swordmage from the Forgotten Realms Player's Guide, and on the bard and sorcerer from the Player's Handbook 2. Like its predecessor, Arcane Power provides new builds, new powers, new paragon paths, and new epic destinies for its classes. However it's a bit different in one way: Arcane Power would be the only Powered sourcebook to cover five different classes, and the only one to cover a non-core class.