Preface:
The preface was helpful as it helped me to understand how useful this book was with the fact that you can download tutorials straight from the book. I thought that was very interesting that it included some of the history of GIS as well
Chapter 1:
This was my first time interacting with GIS and I really enjoyed getting to know ARCGIS Pro and getting acquainted with mapping. I was really interested in learning about GIS and the book did a really good job at explaining how to get started with mapping. 
Chapter 2:
This chapter really helped me start feeling a little more independent with GIS and the processes within the application. Being able to use everything I just learned on a much larger scale was very helpful to me and allowed me to understand many of the intricacies of GIS much better.
Chapter 3:
Chapter 3 was helpful and I liked being able to make the key for the map in question and the graph. Learning how to share maps online was very helpful as well. Overall, I thought that these 3 chapters were very interesting and gave me a much better understanding and appreciation of map making