Set of 4 brand new, never utilized books, list is as follows:.
1. The Art of SEO (Theory in Practice), Second Edition, by Eric Enge.
2. Advanced Google AdWords, Third Edition, by Brad Geddes.
3. Landing Page Optimization: The Definitive Guide to Testing and Tuning for Conversions, by Tim Ash.
4. Advanced Web Metrics with Google Analytics, Third Edition, by Brian Clifton.
Cash money only.