I've posted bits and pieces of this site, but I see they are STILL regularly adding new files... Take a look! While it's labeled the Virtual AGC - most of the files are relevant to all aspects of the STS program.https://www.ibiblio.org/apollo/links-shuttle.html#RecentAdditionsAlso see Ken Hollis (formerly here are Gandalf) with his archive (and handy Google drive link!) at https://gandalfddi.z19.web.core.windows.net/shuttle.html and training specifics at https://spaceflight.training/