Did you check out IPv6 Essentials, 2nd edition by Siliva Hagen?
I've just bought "IPv6 Essentials", however it turned out to be the 1st
edition, hopefully there won't be too many differences.
I'm also going to go through this PDF on the Cisco website that should
put a practical face on the book, which seems very theoretical on a
quick flick through ...
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/12_4/ipv6_1
2_4_book.pdf