The best book I've found for all kinds of fancy lacing, knots, and lanyards is "Leather Braiding" by Bruce Grant - my copy is dated 1961. The ISBN # is 0-87033-039-X. After I saw what I thought to be a 4-thong square braid on Mick's AR/GB in the kydex rig, I went to this little book and did a 4-thong round braid w/Turks Head to finish. Using 550 black paracord and pulling out the inner white strands made for a nice compact lanyard.
Also available is the "Ashley Book of Knots" by Clifford W. Ashley (1973) that has even more interesting knots, but sorry no ISBN #. Hope this helps.