Review of "Dynamics Programming: a practical introduction" by D.K.Smith

I checked out the book from my university library to learn a little bit about dynamic programming. The book is very attractive because it's very concise (156 pages).  For me the main merit of the book consists in introducing the reader to some of the most common problems tackled with dynamic programming. The main drawback is the notation, which is not straightforward.
Chapter 1 explains clearly what dynamic programming is about and when it is helpful.
Chapter 2 introduces the stagecoach problem and the general shortest route problem.
Chapter 3 explains the knapsack problem and some other problems derived from this one. I have written another post with an elementary code to solve a knapsack problem. See here.
Chapter 4: ....