This book is an exploration of mereology and reference, as applied to our experience.  It uses that framework to describe the basic model of cognition: a model of our experience, which is a combination of indirect realism and cognitive psychology.  Various topics in philosophy are described in terms of that model, especially those that have direct effects on our health and happiness. The most recent version of the book is version 1.1, and was released on September 1, 2020.

The book is in the public domain and all proceeds from book sales are donated to charity (after all, a major premise of this work is that our mental content belongs as much to the world as to our bodies).