Self-education is, I firmly believe, the only kind of education there is.
Beware of people who only have one book.
All of the following were helpful in the preparation of Extended STL, Volume 1.
Effective STL, Scott Meyers (Boston, MA: Addison-Wesley, 2001)
Generic Programming and the STL, Matthew Austern (Reading, MA: Addison-Wesley, 1999)
STL Tutorial and Reference Guide, Second Edition, David R. Musser, Gillmer J. Derge, and Atul Saini (Boston, MA: Addison-Wesley, 2001)
The C++ Standard, Second Edition, ISO/EIC 14882 (New York: American National Standards Institute, 2003)
Advanced Programming in the UNIX Environment, W. Richard Stevens (Reading, ...