How, when, and why did mathematics and computing converge for Knuth? To what extent did logic and Turing machines appear on his radar screen?

The early years of convergence ended with the advent of Structured Programming in the late 1960s. How did that affect his later work on TeX? And what did "structure" come to mean to Knuth?

Shedding light on where computer science stands today by investigating Knuth's past — that's what this booklet is about.