You might want to specify about exactly what your background is and what you want to learn in order to get more effective answers.
But given what you've asked for, I'd say the best place to learn about chaos and dynamical systems is absolutely: Steven Strogatz' Nonlinear Dynamics And Chaos: With Applications To Physics, Biology, Chemistry, And Engineering.
If you already know what's in this book, you need to re-phrase the question; if you don't, this is what you need to know and where to learn it.
Enjoy - I think this book this wonderful!