I will take "Outin's" great advice a step farther. As an adult beginner, you unlike the average child student, are paying for your own lessons. Therefore, you are a "consumer." And, as such, you are supposed to get what you pay for!
So, what I suggest is to ask your teacher, politely, what other pieces (with associated recordings, Youtube) that they would recommend which could accomplish the same level of development that is included in this, in my opinion, completely useless book.
If they don't want to, then you will know that they really don't know what they are doing. Then, as previously suggested, you get another teacher.
Oh, and I forgot, you are not only paying for your lessons, you also bought the piano, with its tuning and upkeep, as well as the purchases for any future sheet music.
What all of this means is that your goal is to learn how to play this beautiful instrument, and not, instead, to go through the traditional matriculation practice of kissing your teacher's arse.