A new book about Visualization with Pharo is planned for 2015:
"Agile Visualization is about using computing resources to supersize the mind and cognitive facilities of our brain. Crafting a visualization, in extremely short production cycle, is what characterize the way visualization techniques are presented in the book. Agile Visualization is made for data scientists, journalists, computer scientists, and software engineers. As soon as you need to process data, numerical or not, Agile Visualization will guide you, step-by-step, to fertilize your data."
More infos: http://agilevisualization.com