Moss

[JoshuaWalsh]

Hello, I do not have a degree from school yet but I am very interested in Bryology, I have been looking online for a descriptive and informative book that can help me identify some of the mosses that I have photographed and also just learn more about them, but all I find are terribly expensive textbooks or, more over "kids books"
If you feel so inclined can anyone suggest a read that would broaden my mind to the moss species?

Thank you for your time...

Josh w.