Corrine Duyvis’ 2014 Otherbound is a standalone fantasy.
Arizona teen Nolan is a visionary. He doesn’t imagine things: he sees things. Whenever he closes his eyes — when he blinks, for example — he sees whatever Amara sees.
Amara lives in another realm where magic is real. She has a talent, healing, which makes her nigh unkillable. You’d think this would make her a power in the world in which she lives. It doesn’t. She’s a slave. She’s a slave on the run, following her mistress.