Book Review: Landing Page Optimization: The Definitive Guide to Testing and Tuning for Conversions by Tim Ash , Maura Ginty, and Rich Page. The first edition of Tim Ash’s Landing Page Optimization has been called the Conversion Bible (by me, at least). Unlike the religious tome, though, this resource is far from static. The newest edition has been improved, expanded, and even sports a couple of new co-authors. As before, Ash delves into the psychology and neuroscience of conversion, along with lots of practical advice.