Fantastic Things (A Missy Barrett Chapter Book) (Volume 2)

Missy Barrett loves her brothers, Aaron and Josh. She loves them both so much that there isn't anything she wouldn't do for them. Josh has a rare health condition called Myasthenia Gravis, and Missy thinks it's about time she asked Josh some important questions about what that is. After all, brothers and sisters are supposed to help each other out, and knowing what to do when Josh needs help matters.