Glass books are expensive, aren't they. I know how easy it is to get attracted to Scandinavian glass, to the extent, that, over time, you also become a collector of glass books. I like Smoke & Ice, and Fire & Sea is also good. Bill Geary's Scandinavian Glass also. For tableware, there's replacements.com, but, although I have quite few Scandinavian sites bookmarked, it's books I use most. I checked iitala, 125 years of Finish Glass for your piece, for example. I justify the cost of the books by telling myself that without them, I wouldn't have found the bargains I have found. I don't know if I've managed to convince myself--and I certainly haven't convinced my wife--but the books have led to purchasing beautiful pieces at very reasonable prices. Perhaps not the top of the line pieces like ariel or graal, but certainly pieces I love.
Good luck and welcome to the addiction.