This book ruined many hours of my childhood, when I was in high school. I read it. I didn't understand it. I reread it. I still didn't understand it. At the time, I didn't realize I needed to know basic differential equations, and I just felt dumb.

Then I went to college.

When I looked at it as a more mature engineer, I found it imprecise, sloppy, and also not very helpful. It doesn't embody good design practice, give a proper theoretical basis, and the choice of topics is random.

Many people love it, but I hate it.