If you'd like to see what Donn's BASIC was like, you can! The Internet Archive has a version that runs in-browser [1]. Although the Folklore article says there

If you'd like to see what Donn's BASIC was like, you can! The Internet Archive has a version that runs in-browser [1]. Although the Folklore article says there were two books describing Donn's BASIC, I believe there were at least three: Introduction to Macintosh BASIC, Using Macintosh BASIC, and The Macintosh BASIC Handbook. All three are available at vintageapple.org [2]. [1] https://archive.org/details/mac_MacBASIC.335 https://archive.org/details/mac_MacBASIC.335 [2] https://vintageapple.org/macprogramming/ https://vintageapple.org/macprogramming/