The summary from Sarah's website:
Superpowers are awesome - unless you actually have them, like Avery does. There's only so much he can pass off as "adrenaline" before people start to get suspicious. Probably it's best to lie low, so guys in white lab coats don't come to carry him away, to find out what makes his freakish body tick. Who wants to be vivisected? But flying under the radar becomes a whole lot harder when you can actually fly. It's dangerous to be different, so for now he'll pretend to be normal, unremarkable Avery - a dull boy - anything to keep his secret safe.
What he doesn't expect is the horrifying truth about where his powers came from, who else might have them, and the madness of one villain's plan to turn this superpowered dull boy into something even more powerful and amazing.
I'm intrigued! And even though I'm 99.9% sure now that I can't actually fly, I'm still super excited for this to come out on May 14.
P.S. Carrie says it's amazing and gushes about Sarah's writing in her latest post.