Tatter and Shine

Shine is running out of time. 

She’s a self-taught sorceress in a kingdom that outlaws magic, and the witch hunters are closing in. If they catch her, she’ll face slow death by torture. If she turns herself in, the best she can hope for is a long life locked in a convent. 

She takes a third option: she summons Tatterdemalion, the immortal sorcerer of legend, and offers herself as his apprentice.