Devaney was my advisor's advisor when he did he his PhD at BU. I took a course on discrete dynamics and chaos and wrote my senior year thesis on bifurcation diagrams.

We used this textbook by Devaney: https://www.amazon.com/First-Course-Chaotic-Dynamical-System...

Was absolutely fascinated by the class. One of my favorites from undergrad.

I had his Chaotic Dynamical Systems book checked out from the library for years and carried it everywhere. I should find a copy, what a great book!

I wonder if there's a good sort of "postmortem" on what happened to NLD and Chaos. It seems like everyone said, "Ok, that's a thing and it explains a lot but we can't do anything with it."

Nonlinear systems by Hassan K. Khalil (ISBN 978-0130673893) is also worth it to solidify the underlying maths!