Surprising lessons from 20,000 experiments

Chris Goward You Should Test That: Conversion Optimization for More Leads, Sales and Profit or The Art and Science of Optimized Marketing

Avinash Kaushik Web Analytics 2.0: The Art of Online Accountability and Science of Customer Centricity

Maura Ginty Landing Page Optimization: The Definitive Guide to Testing and Tuning for Conversions