The following books have been written by Craig Winn, and are posted here with his permission. I have found these extremely useful, and as such am sharing them here. You can download the PDFs by right clicking and selecting save as. In addition you can download whole collections by right click the Title above and selecting save as. Collections are in zip files and will require an unzipping program like 7-Zip to view. For those who are interested in physical copies the books can be purchased at Claitors.com and are available for Kindle reading app at Amazon.