The remarkable increase in the speed and power of digital computers and special purpose hardware over recent years has ensured the continued growth of interest in digital signal processing (DSP). This second edition is being published in response to these changes. It includes new material on Random Digital Signals and Random DSP, as well as new and improved software that illustrates the techniques described in the book.
This is currently my favorite DSP book. While it has the relevant equations, it spends much more time explaining why things are the way they are and what the equations mean.
Note that I believe (and follow) the meanings Goodreads gives for what each number of stars means. Therefore, the majority of my ratings are 3 stars ("liked it").