Here is a link to the Big Wall Tech Manual, lots of outdated info, but still worth perusing for big wall climbing techniques:
https://www.bigwalls.net/climb/BigWallTechManual1988.pdfAlso I have been updating Bigwalls.net and will soon post some research on the world's big walls I once was working on for a book for the AAC, which they later cancelled with a change in editors (who only wanted a book on USA big wall climbing--I was more interested in the global history and development of the sport).