Fermat's Last Theorem
Simon Singh has written a book with the same title, and it's natural to compare the two. Well Aczel's is shorter, so it might appeal to someone wanting a less detailed read. The historical phase gives more information on the mathematicians involved than just their work related to FLT. Hence the book seems to wander around more than Singh's - one gets less of the idea of a thread running through the book.. There is more treatment of modular forms - their history, and simple descriptions, as well as the stories of Shimura, Taniyama and Weil. But in conclusion I would say that this book is aimed at those wanting an easy to read overview of FLT.