2014’s The Red Ring is the second volume in Jen Frankel’s Blood & Magic series. My review of book one, The Last Rite, is here.
In the previous volume, in order defeat a vicious warlock, almost-sixteen year old Maggie Stuart gave up her magic and now must live as a muggle. None of her former friends remember that she saved them from the warlock (or even that they had been her friends). Her loathsome mentor is pressuring her for sex. If she had any friends, she might cry on their shoulders … but the last three years has sent her decidedly into social reject territory.
Magic is about to come back into her life in a big way.