Just a passing thought, at http://files.pharo.org/books/

it might be nice for the top descriptive text to indicate a reading order. ��

Something like...

�� �� Newcomers should start with Pharo By Example, then proceed��to: ��

�� �� - Spec UI Framework for desktop applications,��

�� �� - Enterprise Pharo for web development,��

�� �� - Agile Visualization for data processing.

�� �� Deep Into Pharo and Numerical Methods are broadly applicable to all three domains.

cheers -ben