Having bought and read "Longitude", the only lightly illustrated original hardback version, I wanted to know more about how the actual clocks worked, and I wanted to see them, without making a trans-Atlantic pilgrimage to Greenwich.

Hence, when I saw an illustrated version of "Longitude", I had to buy it. This book contains the original text, with no additions, except for the illustrations. The photographs are beautifully done, as is the printing.

My only hesitation in not awarding the book five stars is that I was hoping for one of two things; either an illustrated version of the original, with a couple of pictures of each chronometer, at a reasonable price, or a more detailed illustrated version, with more information on how the chronometers actually work. What we ended up with is a compromise. Beautiful pictures of the chronometers, but little extra detail of Harrison's marvelous inventions.

Still, an improvement on the original, which is an excellent book, one I have read several times. Highly recommended.

By the way, when I purchased this book, I donated my original version to the library.