If you ever thought about starting ballet and have no idea what to expect, this book has the things I think might help with that. This book probably also would help with an understanding of ballet for the sake of writing(they say write what you know, research what you don't).
*NOTE*: These are just things that I have compiled over the time that I have been dancing. While I have been dancing for a while, I do not claim to be an expert of any sort. I will later run this through my ballet teachers and friends to see if they have any input, but for the time being, take this into consideration.