By means of engaging, imaginative visuals and endearing narration, Schwartz manages the monumental task of presenting the complex concept of this book in fresh and relatable ways ... This book is a wonderful enrichment for any math education program and is enthusiastically recommended to every teacher, parent and grandparent, student, child, or other individual interested in exploring the vast universe of numbers.

This book is a masterpiece. Starting with small, easily observable numbers and building up gradually to the dizzyingly huge ones towards infinity itself, the author takes readers on a fascinating journey of discovery, making increasingly complex concepts accessible through a combination of striking illustrations and passionate, enthused writing.

Schwartz does a very nice job of mixing very elementary ideas with mathematical content that will be new even to mathematicians, making for a fun and enlightening reading experience. ... [A] written review such as this cannot capture the spirit of Schwartz's book, every page of which is illustrated with bright colors and beautiful drawings that are appealing to look at even beyond the mathematics that they convey.

This book is a chance to learn something new about the really big numbers. But it is also a chance to experience the awe, the mystery and the playfulness of math with your child and as a child.

This is a classic book to which I can imagine a child returning again and again as s/he grows older, getting more out of it each time.

The book gets better with every reading. ... It is great for sharing, and for explaining why we like mathematics so much. Get it with someone small you love, and start a journey. ... This book would clearly make a great present for mathematicians to give to their children.