Good training language which you will need to unlearn.
Some of us ancients grew up in a world of punch cards. The more fortunate and more flexible way to train in computers is with the BASIC computer language which is the closest cousin to the “c” computer language. In a world that demanded structure where even COBOL programs are written spaghetti code, we got the invention of Pascal.
Pascal is a great training program that forces logic and structure down your throats at the expense of speed and efficiency. Granted some structure when possible is needed in this world hence the invention of C++. But even C++ allows you to adjust whatever is needed to accomplish the purpose of the program a lot without a lot of bloated code. So learn Pascal by all means. You will find this book sufficient for all the Pascal you need.
They also seem to have left off the chapter on signal handling.