I used it as a proper to reading the definitive works on the subject by Judea Pearl. Unlike Pearl, this book emphasizes human thought and process with only a cursory overview of the mathematical formality. It is well-reasoned with excellent examples and clear points. In the end it did seem a little un-targeted, making a general "this is important stuff, worthy of attention" statement, but definitely insightful overall.

The subject focuses on the human plausability of causal models, models of the "why" of things, for how we think and make many of our decisions. Sloman didn't come up with the bulk if what he's talking about, but he is making strides in connecting it to human psychology.