Twentieth-century artillery

This is a great book for recognizing artillery -- each page has a picture of a piece, a description, and a table with vital statistics. Artillery is grouped into categories (i.e. Field and Heavy Artillery, Air Defence Artillery, etc.) making it easy to find a given piece. (Look up the Paris Gun for a truly amazing sight.) I only have two complaints -- first, that it's incomplete, though that's to be expected (the subtitle is "300 of the world's greatest artillery pieces), and second, the same complaint I have about Armored Fighting Vehicles (by the same publisher) -- the table doesn't include the date it was introduced. Some of the summaries include dates, but not all. Overall, it's a very useful book!