Cunningham's Encyclopedia of Crystal, Gem & Metal Magic
Scott Cunningham
Cunningham's Encyclopedia Series (2)
The Devil of Dunmoor
Meggan Connors
Deep Wizardry
Diane Duane
Young Wizards (2)
The Pearl of the Soul of the World
Meredith Ann Pierce
The Darkangel Trilogy (3)
The Frugal Wizard’s Handbook for Surviving Medieval England
Brandon Sanderson