Our online library contains books that have influenced our thinking and mental models. These have been collected from around the Internet, and hosted here at this web site and on our Google Drive. These books were not scanned by us, and we would like to thank those that have undertaken this difficult task. While we believe that information should be free, disliking restrictive copyrights, we recognize the rights of others to decide differently. The Materials provided here have expired copyrights, or have otherwise been made freely available by their respective owners. If there are any copyright infringements, contact us to request removal of the offending material.