This book starts the first chapter to practice turtle graphic drawing - well, a good way for kids to have fun in getting to know how to program. But for serious learners who want to gain a concrete understanding of the python language, this book lacks some structural introduction of the basic fundamentals of the python language.
The differences and progresses to advance chapter by chapter are not quite clear.
The book is concise, but a basic knowledge of Python is required to understand the material. I had to go through it two times to understand. A solution appendix for the exercises would help in understanding the materials.