The Elemental Keyes by Sam Burns

Today is the day the world ends.

Fine, tomorrow is the day the world ends, but is that actually better? My name is Blaze Keyes, and I’m a seer. Since I was a kid, I’ve known that the world was going to end on my twenty-fifth birthday.
But the day before the apocalypse, the most unexpected guy falls into my lap—or maybe I’d like to fall into his. Elethen is tall, handsome, a type of mage that disappeared from earth a century ago . . . and an elf. Also, he says he fell through a portal from another world, and I sort of believe him.
If I can’t save earth, maybe I can at least get Elethen home safe. Or if we can get my infuriating brother to work with us, maybe we can save everyone on both of our worlds. Maybe the world dies tomorrow, but damn it, I’m not going out without a fight.