Time machines : time travel in physics, metaphysics, and science fiction
However, I did get the feeling that, at nearly 600 pages, this book had expanded out of control. The first chapter is overview of about 100 pages and I was impatient to get onto the main part of the book. I also feel that the prospective readership could have dealt with more diagrams and equations in the main body of the book, rather than having these relegated to long 'tech notes' at the end.
I also felt that Nahin was often too dogmatic in judging other people's ideas. If the purpose of the book were to present Nahin's own ideas then this would have been fine, but as it is billed as a compendium of various ideas about time travel I felt that this dogmatism was out of place.