I personally have not read her book, but I did see some of her Youtube videos back when I was preparing for the exam earlier in the year. I found her presentations in those videos to be helpful and easy to follow. Aileen broke down the concepts in much simpler terms versus the way they were presented in the PMBOK and the "Rita" book.
This interview with Simona Fallavollita (LinkedIn Profile) was recorded at the magnificient Project Management Institute (PMI)® Global Conference 2017 in Chicago, Illinois. We discuss the how, what, why and when of the changes that are coming to the PMP exam.