I was reviewing this as something to pass the time. Made it about halfway through the book before becoming bored due to the content, not the presentation.
How to summarize this book? It's a collection of algorithms (with derivations) on how to solve a variety of differential equations. As such, it is very good. My problem with it is that after a while I got bored learning algorithms, when I could just look them up when needed. But it did provide me with a month's worth of entertainment as I scoured my mind for the memory of how to do various integrals and differentials needed to solve these problems.