Recently I've been reading a publication produced by the National Institute of Standards and Technology (NIST) titled SP 800-119: Guidelines for the Secure Deployment of IPv6 (PDF). While it does emphasize security as its name implies, the document can be considered a very thorough and easily digested source of education on IPv6 implementation in general.
From section 1.2:
The purpose of Guidelines for the Secure Deployment of IPv6 is to provide information security guidance to organizations that are planning to deploy IPv6 technologies or are simply seeking a better understanding of IPv6. The scope of this document encompasses the IPv6 protocol and related protocol specifications. IPv6-related security considerations are discussed with emphasis on deployment-related security concerns. The document also includes general guidance on secure IPv6 deployment and integration planning.
The document begins with an introduction and overview of IPv6 and progresses into advanced IPv6 topics and deployment considerations. Where appropriate, comparisons and contrasts to IPv4 are drawn. Overall, the authors maintain a favorable balance between technical detail and readability, and avoid digressing into any specific vendor-dependent issues.
The document is well worth at least skimming, even for those already familiar with IPv6. It contains, essentially, several hundred hours worth of research neatly packaged and made freely available. Readers also will likely be interested in perusing the rest of NIST's 800 series of special publications, which deal with everything from cloud computing to PDA forensics to cryptography.
Thanks to Infinite over on Networking-Forum.com for the heads up!