James Gleick's "Chaos" remains, in my view, a great popular book on the subject, and manages to convey many of the ideas at a conceptual level without getting technical. And if you enjoy that, you might also like Strogatz's "Sync."
For slightly more technical treatment, Strogatz's Nonlinear Dynamics and Chaos is now a standard text. It isn't terribly technical and is quite well written and (in my view) easy to read for anyone with a background in vector calculus, diff eqs, & perhaps a little bit of linear algebra. (There are now other good options to, some more mathematical and some more application-oriented, but I still think Strogatz is a good place to start.)
Second Strogatz, does an amazing job linking the math to the visual intuition--probably less rigorous than some texts, but the perfect balance for an intro. Took an amazing course based on that book with Charlie Doering, who has sadly passed. He could draw multicolor, qualitatively-correct 3D attractors freehand on a chalkboard while helpfully narrating the system dynamics.
Can you expand on the last part? I mean the good other technical books for someone already a bit familiar who wants a deeper dive? Thanks for the pointers
For slightly more technical treatment, Strogatz's Nonlinear Dynamics and Chaos is now a standard text. It isn't terribly technical and is quite well written and (in my view) easy to read for anyone with a background in vector calculus, diff eqs, & perhaps a little bit of linear algebra. (There are now other good options to, some more mathematical and some more application-oriented, but I still think Strogatz is a good place to start.)