Good book focused on getting away with legacy IP (IPv4) thinking, recommendations based on author's experience on a large ISP and some related IPv6 related technologies such as DNS, DHCP, dynamic routing, IPAM, etc...
It won't touch too much technical or how to do configurations as it would be a vendors guide, instead you get to learn how to proper plan address for sites on all sizes and how to decide what is a site to you (i.e. geographical region, country, worldwide), how to divide network addressing based on organisation needs or structure to be able to scale growth while allowing optimisation of prefix aggregation to keep manageable routing tables. You will get to hear a lot ditching legacy style allocation as this shouldn't be an issue in IPv6, and focus on nibble boundaries and network functions.
This is not a beginner's book on IPv6, but a reference to better plan and deploy once one has background information on how headers, ND and configuration works, but a very good complementary learning once you grasp the foundations of next generation IP.