Online microeconomics textbook

NewEconomist brings to our attention a new free online textbook on MicroEconomics by R. Preston McAfee. At a short and first glance it seems as a good alternative source of information and analysis to the other textbooks out there and incidentally this is also how it is marketed.

"The focus of this book is on the conceptual tools and not on fluff. Most microeconomics texts are mostly fluff and the fluff market is exceedingly overserved by $100+ texts. In contrast, this book reflects the approach actually adopted by the majority of economists for understanding economic activity. There are lots of models and equations and no pictures of economists."