These angels are sweet but very firm: they get him reenrolled in college and ride Dennis until he graduates with good grades and is admitted to medical school; they cook his meals and wash his clothes, they prepare flash-cards and alternately chide and praise him all the way along.
Now in med school, Dennis begins to realize that his "destiny" isn't what he wants from life -- he misses his video games, and senses a yawning chasm between the life he is being dragged into and the life he needs to live. What happens next is touching, surprising, and extremely satisfying (and I won't give it away).
Yang's got a gift for characters who understand their duty but don't fully believe it; Level Up is a great example of that dilemma. It's a manifesto for everyone who's ever wrestled with the expectations of their family, their friends, and their society (and who hasn't?), and it's ultimately both humane and inspiring.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.