No 1 gram of pedagogy

I had the author of this book as a teacher one year, it was very hard to align equations pages without ever explaining anything.
It is the same here. In this block, you have adjusted the entrance examinations for the grandes écoles, nothing more. Useful to train, but not with that as you progress in the understanding of physical phenomena.
In short, I would not recommend unless you do find used less than 10 Euros.