This book is written in the same style as the Kaplans' "The Nothing That Is: A Natural History of Zero", i.e. a friendly, somewhat informal, somewhat comical approach to the subject matter. That said, the content is very well presented and rigorous in terms of its correctness and completeness, at least for something which is not a journal article nor a textbook. The book starts with counting in the naturals, moves on through Z, Q, R, C. It is showing at each step what is going on with the extents of these spaces and what happens when their limits need to be breached. The book also works at things from a geometric standpoint, and then, a la Descartes, shows how the algebraic/coordinate complements the geometric. Pushing on with limits of space, it progresses into modern elements with projective geometry and then finally falls into the Abyss with Cantor and counting infinite sets, transfinite sets, alephs, etc.
The book is very approachable and gives good historical information on the movers and shakers involved. The book also is looking at the philisophical implications of moving towards Cantor and his amazing results.
A good read. There is some math in this book, but that is a good thing!-)