This book is a gem, concepts are greatly explained and is full of references to papers and other articles. I've heard people clearing systems design interviews

This book is a gem, concepts are greatly explained and is full of references to papers and other articles. I've heard people clearing systems design interviews just by using this book as reference. I'm not sure if it's an exaggeration but from what I can see it does a great job convering the fundamentals of scalable systems.