The following are online resources for further, recommended readings that explore the relationship between extroversion and introversion.
Kingdom of Introversion
Series of blog entries where the author personally explores the interactions between social contexts and introversion and how he relates his own identity to this. A very good read!
Introvert ZoneCollection of blog entries by a single author and commentaries made by many people coming together nationally, for the purposes of exchanging experiences, sharing advice, and the means to identify with each other as introverts. Selections of recommended books have been placed on the website as well.
Caring For Your IntrovertHumorous article written in slight exaggeration to drive the main points across with general characterizing of introverts and debunking popular myths about them.
Revenge of the IntrovertsColumn article that appeared within the October 2010 issue of Psychology Today and also explored many of the issues that introverts currently face.