Xen Books: Running Xen
Prentice Hall has released a sample chapter from the book Running Xen: A Hands-On Guide to the Art of Virtualization at http://www.informit.com/articles/article.aspx?p=1187966. Some of the book’s authors will be leading the Xen workshop at USENIX Technical Conference in Boston and possibly presenting at Xen Summit. If you are looking for a good book on the Xen hypervisor, I suggest taking a look at Running Xen.