Over on the MSPress blog they have an announcement
Mitch Tulloch has updated his free ebook of last year. You can now download Understanding Microsoft Virtualization R2 Solutions in XPS format here and in PDF format here.
I’ve worked with Mitch on a couple of books, including the first release of this one, and seen a couple of others they’ve all been good (poor books from MS press are very few and far between). If this was a paper book which you had to pay for I’d suggest it is well worth looking at - but it’s a free download (print it or view it on screen : your choice) so, seriously, if you expect to be working with Hyper-V in the foreseeable future you’d have to be daft not to download it.
I'm noticing that the links are not working, did they expire?
@ Emilio, I just tested them and they all seem to be working