Each of the chapters goes into some detail. The chapter on security, for example, describes the Photuris key exchange system quite thoroughly, while the chapter on flows enters a little into the issues of fair queuing. Each chapter also discusses the points which were controversial in the decision process: such things as the length of the addresses, the mandation of potentially unexportable security support, the relationship between IP and ATM, and the choice of a dual-stack approach to IPv4-IPv6 integration rather than use of header translation. IPv6 has much more meat to it than Bradner and Mankin's longer IPng, though the two books are really complementary, with the latter dealing more with the historical context and the framework within which the decision was made than with IPv6 itself (the difference in titles is appropriate).
IPv6 is a very nice little volume, marred only by poor proof-reading — there were far too many simple grammatical mistakes, and at least one spelling error which any automated spell-checker should have found. Anyone interested in the technical details of IPv6 will want a copy — even if you are prepared to wade through the relevant RFCs, IPv6 provides annotated references to these and other important papers at the end of each chapter.