x1=f1=c3 authors/creates book x2=c1 about/containing work x3=c2 for audience x4=c4 preserved in medium x5=c5 for purpose x6=f3 from elements/ideas/inspiration x7=f4.
x1 (agent) creates 'hack' x2 (nu/zu'o/si'o) for system/tool x3 from inspiration x4; x2 is an emergent use/purpose for x3, unexpected by the original creators or users