The books were a great success - it was a pleasure to work through the lessons with her and now she eagerly plays everything she can in both books.
The books themselves are beautifully printed and easy to read. They are mostly just the music with little or no text interspersed among the pieces. This means that a beginner will need some additional help with some of the basics - holding the recorder, breathing, basic fingering, etc. There are plenty of method books that cover those details, but no other books I know of give you so much interesting music. It's easy for beginners to get the feel for what early music and recorder playing is really like.
I strongly recommend these books. If you are an adult beginner with access to a teacher then I suggest you look for volume 1 for the alto recorder, if and when it is available. Altos are easier and more fun to play than soprano recorders if your hands are bigger than an 11-year old's.