I've read this anecdote recently
Gerald Sussman, co-inventor of Scheme and author of SICP, was my undergraduate advisor. The last several times I visited his office, he was usually with Jack Wisdom either programming or deep in thought or discussion about differential geometry and the differential geometry Scheme library they were writing. One time when he wasn't so occupied, I brought up SICP, and asked if he was aware that a lot of people think of reading the book as a sort of magical, enlightening experience. He said, "Yes, I'm aware." I asked if he had any idea why. He said, "The main reason is that it tells a good story. It also has a complete, coherent narrative."