Cremio,
If you had no more questions, it's quite probable you were done. You may need to acknowledge that a 60 page book is really only going to give you some general information. That the general pros and cons that you mind mapped were about the depth of it.
For this book I suggest you give it a rapid read for conclusion. Your questions ...what else etc are fine.
To really experience this book gelling for you give it a rapid read then note your mind map what you felt you missed. then consider the 80/20 rule. You probably got 80% of the information in activation. The last 20% in a longer rapid read activation. The question then is did you get the information you were seeking in the first part of your activation?
Comparing that you will notice what it builds up to to have a book gel.
Alex