Check out The JavaRanch Bunkhouse for some book reviews on some good Struts books. The Struts books are under the J2EE category.
I personally like "Struts in Action" by Ted Husted et al.
You can find a lot of good tutorials by Googling "Struts Tutorial". Look at the date and version, though, because some of them are very old and don't work with newer versions of Struts.
