Well this is the art book for Farewell to Weapons. It has all the original designs (both drawings and kitbashed models) that appeared in the comic as well as Otomo's monograph, Kaba. And all the model sheets for everything you see in the short are in here- I had the hardest time editing it down to my usual 800x1600 book review format. Painfully hardtime.
I paid about $45 for this at Kinokuniya and its worth every penny.