Have just ordered mine from Amazon which should arrive on Monday. I love these guides, the bird one in particular is a spectacular book full of detail and distinction that you just don't see in many field guides. I'm sure I will love this one too.
Delighted to know it is finally out, and will certainly be adding it to my shelf of mammal books. I too find the series as a whole an excellent source of reference. They are quality guides, and equally important, very reasonably priced!