These are the books by Mark Robson that are reviewed on this site:
Calvyn puts all his knowledge of magic into the forging of a powerful sword which he wields in a mighty battle of good against evil.
Jenna must use all her strength and skill as a trained soldier, and she must put her trust in Perdimmon the magician in order to save Calvyn from the Lords of the Inner Eye.
Part of the Darkweaver Legacy series. Powerful mixture of fantasy magic and mortal combat.
Can the evil Selkor make himself the Chosen One simply by stealing the Keys of Power, or will the Keys choose for themselves?