Thrilling Magical Realism: Call Down the Hawk by Maggie Stiefvater
Meet the brothers Lynch. While all three of them became orphans when their father died, not all of them are human. Arguably none of them are, since their father was a dreamer, someone who can dream things (and people) and bring them back into reality upon waking.
Declan, the eldest, seems the most humanish, since his mother appears to have been a real woman.
Ronan, the middle brother, seems less so, since his mother was a dream. Quite literally. One of the things Ronan’s father brought back from his slumber was an imaginary version of Declan’s mother. This dream woman gave birth to Ronan, who, like his father, is a dreamer.
The youngest brother, Matthew, is most certainly not human. As a child, Ronan dreamed him into existence.
Being not-quite-human is a problem for the Lynch brothers. According to the prophets, a dreamer will someday conjure up the apocalypse, and fire will consume the world. Governments worldwide have created teams of Moderators to stamp out this menace.
Carmen Farooq-Lane, a young woman of extraordinary elegance and poise, is one of these foot soldiers. But no matter how many dreamers she tracks down and kills – including her own brother – the oracles’ visions stay the same. Still, the world is going to burn.
If she finds Ronan, he’s toast.