An excellent book to review, assimilate, and perfect

My youngest son has unfortunately inherited a book during Maths pitiful, horrible. It raises the standard and allowed me to keep hope he understands what he was doing in math and advancing steadily.

After a brief review of key concepts, axioms and theorems of each chapter, we apply some simple exercises that help understand the basics well and assimilate what we have to learn and understand. The deepening exercises really go further (I was once or twice forced to watch the corrected). The last adjusted will not re-explain everything but clear enough that we learn really.

I heartily recommend this book and I tend to think that the entire collection will be the same grain.