Note to the unaware, both* this version and the classic (Scheme) version are Creative Commons-licensed and freely available online. (*edit: thanks to keithwinstein for enlightening me -- I wrongly thought it was just the one. The publisher's site doesn't advertise this at all!)https://sicp.sourceacademy.org/ (JS version) https://mitpress.mit.edu/sites/default/files/sicp/index.html (1984 classic) h