A very handy book to have around. But it must be used to be effective. I don't store it on my bookshelf; rather, it has a place on my desk next to my computer within reach at all times.
I first used it starting in Spring of 2019. But it's a meditation book, not a book that one finishes and never reads again. So I can't answer the question below regarding finish date.
If the author reads this, my sincere thanks to you for writing this. May Our Lord bless you richly!