Yes, Celtic Age was the first Avalanche book I purchased, largely because I DID find the cover attractive, and on topic to boot!
If Viking Age had a comparable cover it would also be finding room on my shelf, but alas, the cheesecake recurred.
Celtic Age is very well written, but then I am biased, being only third generation American.
The Auld Grump, who likes period, on topic covers, darn it!