The information on this book is just awesome, it is a very good written book, well-organized, hands-on approach; if you want to know your way into ADempiere this is the reference to look for. Highly recommended, since it takes you from the installation to a comprehensive functional description of the most common enterprise processes.
Author is very knowledgeable about business, besides the technical and functional aspects of ADempiere.
Can't wait for 2nd Edition, including Libero Manufacturing and Human Resources.