by Brandon Sanderson
This was a novella, a quick read. True to form, Brandon Sanderson quickly creates a vivid world with imaginative magical / sci-fi mechanics. The protagonist, Kai, is the God-Emperor of his own State, a virtual reality created to entertain the brains of humanity, all of whom are relegated to sitting in jars in a warehouse. The adventure begins with Kai is summoned outside his realm to procreate with another human -- in another virtual world. The mechanism behind that is hand-waved away, but it brings about an interesting story.
I'm a fan of Sanderson's writing, and here he easily accomplishes his M.O. of creatively bringing to live a universe -- or in this case, a multi-verse -- while telling two of the most normal stories of all: love and war.
It's not a long read, and I'm not going to spoil it for you, but if you enjoy anything else by Sanderson, this is definitely a good one to pick up. It's cheap too, at just a dollar (as of this writing). Check it out. You won't regret it.