It's not just about recurrences. Although, It looks like this at the first glance. This book will give you mathematical mindset which you will be able to apply in practice (while working with algorithms).
Each chapter in the book is written in essay style, authors gave you very curious math pearls, and teach you how to think by using these examples.
Each chapter in the book is written in essay style, authors gave you very curious math pearls, and teach you how to think by using these examples.