Most people here may have scraped work on decision theory. But Hubbard turns the field into a coherent skillset. Otherwise you're just sitting around talking about decision models instead of using and practicing with them, for everyday living. This is what Hubbard gives you.
"Smart Choices" is a book which may be better known but complements FoDA nicely as an entry-level supplement.
Sounds interesting, but I couldn't find this in a quick preliminary search. Do you have a link handy? The only book titled "Foundations of Decision Analysis" I came across was by Howard and Abbas.
Also, not sure if this is related to the Hubbard you refer to or not, but there's a gentleman named Douglas Hubbard who has written some really excellent material in this area. I consider his book How To Measure Anything to be one of the best / most important books I've read, and it's one I recommend to pretty much everybody.