[MetroMPG]

It's probably worth picking up, but I can't answer that without a comparison.

I skimmed the entire Hucho book 4th ed. this weekend - it's really good. Highly recommended to anyone with an interest in the subject. And it's encyclopedic compared to the Barnard book.

I'm looking forward to going through it properly.

EDIT: I'd guess that one area that's missing from the 2nd edition is the part on computational fluid dynamics. No big deal - the meat of the book is the history, theory & testing.