This is a fast read free e-book written by photographer Anne McKinnell. I liked this book very much because it really explains (in a clear way) how to identify various types of light, and how to use these types of light to your advantage as a photographer. She also has a nice Blog I follow that you can find here.
One thing I would have liked to see in this e-book though are more visual examples. The author provides some sample photos for each type of light, but I think more examples would help the reader conceptualize what each type of light does, and how to identify it.
Overall I think it’s a great book every begineer photographer needs to read. It certainly helped me understand light better.