I love this book, reading it right now: Power Programming Mathematica: The Kernel. It's (legally) free, you can find PDFs. Bonus: I love weird books covers.

I love this book, reading it right now: Power Programming Mathematica: The Kernel. It's (legally) free, you can find PDFs. Bonus: I love weird books covers. This one is charming. Am I the only one that notices that the barbell is bending upwards?