I thought this book was free but didn't see that it was only free for Kindle Unlimited until after I had hit buy. My guess would be that this book was written in another language and then badly translated or written by someone whose first language is not English who did not use an English speaking proof reader. There were parts of the book that made no sense. Some parts I had to read a few times to interpret. It was also very short and barely scratched the surface of bullet journaling. You can learn more reading a blog or watching youtube. The author also simultaneously was explaining how to do this whilst dissing the concept of bullet journals.
Title best part of the book that was misleading. Thought I was getting help to set up computer journal. What I got was simplified notes that refers to some unknown video they found hard to follow. Waste of my time.