Julia (The Magician King, by Lev Grossman)Read about another entry on the list.
In the second book of Grossman’s adult fantasy trilogy starring young magician Quentin Coldwater, Quentin’s high school friend and former crush, Julia, earns a co-lead credit. Unlike the comparatively pampered students of Brakebills magic college, “[Julia’s] magic had sharp, jagged edges on it that had never been filed down.” Having been tested by Brakebills, and having her memory of it (mostly) erased after failing the entrance exam, Julia becomes obsessed with recapturing the magic she’s lost. Self-taught as a “hedge witch,” she works herself to the bone and eventually teams up with other magical outcasts to perform ever greater (and more terrifying) feats of magic.
--Marshal Zeringue