This is a really nice book--upbeat, encouraging, and full of helpful advice for new or discouraged writers. It makes writing feel very doable in a way that some other books don't.
My only quibble is that the author has a tendency to define words that most people learn in elementary or middle school (she explains simile vs. metaphor, describes what a garret is, and defines pitch, timbre, and dozens of others). Halfway through I began to wonder if this book was intended for a YA audience. I think she should re-read the section that talks about how you shouldn't dumb down your material for your readers.