This is a widget area - If you go to "Appearance" in your WP-Admin you can change the content of this box in "Widgets", or you can remove this box completely under "Theme Options"

Bulletproof Web Design: Improving flexibility and protecting against worst-case scenarios with HTML5 and CSS3 (3rd Edition) (Voices That Matter)
Bulletproof Web Design: Improving flexibility and protecting against worst-case scenarios with HTML5 and CSS3 (3rd Edition) (Voices That Matter)
Above the Fold, Revised Edition
Above the Fold, Revised Edition
Ordering Disorder: Grid Principles for Web Design (Voices That Matter)
Ordering Disorder: Grid Principles for Web Design (Voices That Matter)