Dreyfus wrote an amazing essay for this book. If it didn't cost so much, I'd say this is a must buy for that piece alone. Why do publishers insist on keeping such amazing material out of the hands of students? Release this one in paperback! White's interpretation is novel and exceptionally clear. There are some great books on the early Heidegger. There aren't as many good ones on the later Heidegger. This is one of the few.
This book complements Dreyfus' excellent 'Being in the World' perfectly. I can't think of a better pair of commentaries to use in a seminar on Heidegger. Whereas Dreyfus concentrates mostly on Division One of 'Being and Time', White aims to interpret all of Being and Time, and especially Division Two, in the light of Heidegger's later thought. This is exactly the sort of work many Heideggerians have been waiting for from Dreyfus or, as in White's case, one of his talented students. It is masterfully and beautifully written, and it accomplishes its extremely ambitious aims in less than 200 pages. There are references in the footnotes to unpublished chapters that are available online. As soon as Ashgate publishes this book in paperback it should become a standard resource.