My mentor Zach Evans is amazing. In this book, he talks about how we can practice scales as efficiently as possible, with his amazing exercises and techniques. A must-read if you are a piano learner, or if you are a piano teacher, this is the perfect book for scales. The great thing about this book is that he explains every single exercise or concept with precise detail. Don't have time to read? There is also an audiobook version of it and it is amazing too.
Buy the book, read it and implement every single thing that he talks about in this book and you will become a master in piano scales. So, enjoy!