I know following beginner JSF books are avilable in E-BOOK format.
JavaServer Faces JSF (Hans Bergsten, O'Reilly)
Mastering JavaServer Faces
core JavaServer Faces
JavaServer Faces in Action
there are also some advanced JSF e-books available
Also since JSF is part of Java EE 5 standard now, Java EE 5 tutorial contains some chapters about Java EE 5
please note that since JSF has slightly changed from version 1.1 to 1.2 (the one in Java EE 5)
all the above books except Java EE 5 tutorial are a little bit out of date.