As you might already know this book is the basic of analysis, this is literally the introductory book to analysis. It goes into Sequences and Series, Functions and Continuity, Differentiation, Integrations etc (see "contents" for more detail).
The author of this book explicitly says that a prior knowledge on Calculus is expected before reading this book and he really means it. If you did your Calculus I (limit and derivative), Calculus II (integration), and Calculus III (multivariable) a year or two ago, you need to go review at least the topics that are covered in this book. Remember all the convergence/ divergence (Comparison Test, Limit Comparison Test, Ratio Test, Root Test, Lebeniz Test, P-test etc) tests that you did in Calculus II (?) The author manages to squeeze them all in 5 pages or so.
The major drawback of this book (for me) is lack of exercise. There are very few sections which have more than 10 problems, most have 6 or less. Here is a detailed data:
chapter 1 has 6 sections but only 24 problems
chapter 2 has 7 sections but only 44 problems
chapter 3 has 7 sections but only 37 problems
chapter 4 has 5 sections but only 17 problems
chapter 5 has 7 sections but only 27 problems
chapter 6 has 3 sections but only 19 problems
chapter 7 has 3 sections but only 19 problems
chapter 8 has 2 sections but only 1 problem
chapter 9 has 3 sections but only 1 problem
thankfully solutions to all these problems are available in the back of the book. These solutions are worked out well enough.
Another drawback of the book is that it does not inspire you. In most mathematics book (or any other course book for that matter) each chapter begins with a little bit of history, real life application or something that helps connect to the student. This book barely does that. Usually, the section starts with a theorem, followed by a proof or two, and finally two three examples.
Overall imo this book is more of a "study guide" than a textbook itself. The publisher say this book can be used for self study as well as course textbook. I will admit that this is an easy self study book but i would get a more detailed textbook to tag along with this, just in case.