an excellent edition

Not easy to find a good edition of the "Art of War". This is one of the newest, and in my opinion one of the best (although, I confess, I do not know Chinese, and therefore can not have informed opinions on the quality of the translation).
To my knowledge, two other editions are available in pocket.
There was first the translation of Father JJ Amiot SJ, whose main interest to be the first in a European language. The good Father has indeed demonstrated an imagination that was perhaps good form in 1772, but is much less today! Anyway, its translation is available from Pocket.
Champs Flammarion publishes the translation of the General Griffith, in other words, a translation in English. The introduction is very interesting and mainly the military aspects of the work.
This translation will, however, is the work of a French sinologist. Its introduction is exciting if one is also interested in cultural context of the work, including its relationship with Taoism.
Those who bought "art of war" read with profit "the thirty-six stratagems" and the work of Musashi, "the Treaty of Five Rings."