Avalon Warlock Diaries Omnibus

"(W) Rachel Roberts (A) Shiei Teenage mages Emily, Kara, and Adriane have their hands full monitoring the portal at the Ravenswood Preserve. When a new student, a young warlock named Donovan, shows up at Stonehill High, monsters being attacking Ravenswood looking for him. However, Donovan holds a fairy map with a portal sequence that could lead the mages right to Avalon, the source of all magic!"