Annabel, from 1906, was the first of L. Frank Baum's pseudonymous books. This is the only title written by Baum under the Suzanne (or Susanne, depending on the edition) Metcalf name.
It's been a while since I read this book, but I remember when I first read this story, I thought the title was a bit strange since the character Annabel doesn't have much to do. However, she does inspire the protagonist so I suppose the title is appropriate!
This book is very difficult to find copies of, and generally quite expensive. My rather worn copy is the second edition, with a new cover design. The first printing was more in the style of Aunt Jane's Nieces and Sam Steele's Adventures - a slightly smaller, simpler book with a paper label on the cover. For Annabel, the label was shaped like a bow.