Here are some resources that have helped me on my journey through information security and continue to serve as references as I learn more. Many are regularly updated with the latest tools and techniques in their area. I encourage you to refer to these resources as you work through this book, so they are listed here by chapter. At the end of the list are some excellent courses that you might use to further your study of pentesting.
NIST Technical Guide to Information Security Testing: http://csrc.nist.gov/publications/nistpubs/800-115/SP800-115.pdf
Penetration Testing Execution Standard (PTES): http://www.pentest-standard.org/
Command Line Kung Fu: http://blog.commandlinekungfu.com ...