We received the schedule from Springer yesterday. It’s planned to send the book page proofs to us in the week commencing 5^th May, and we have 12 days to review them and provide corrections. The Springer web site is now specifying a publication date of 2^nd June. In the meantime, we’re working on some supplementary material that we plan to publish elsewhere in pwofc.com also on 2^nd June – the analysis we undertook to identify the practice hierarchy, an overall practice hierarchy diagram, and an expanded overall set of references.