Here is a random collection of trivia about the book Structure and Interpretation of Computer Programs by Harold Abelson, Gerald Jay Sussman, and Julie Sussman.
The book cover depicts two men. The man on the left is Hermes Trismegistus, and the man on the right is Ramon Llull. Both are depicted as alchemists. These illustrations are taken from Le Moyen Âge et la Renaissance (volume 2, chapter 2), a 19th century French book full of woodblock illustrations. The back cover of SICP says:
Cover images adapted from Le Moyen Age et la Renaissance
Music in SICP video lectures
In the SICP video lectures, there is some music played at the beginning of each lecture. The title of the piece is Jesu, Joy of Man's Desiring composed by Johann Sebastian Bach.