The brothers head off to Iceland to look for an old fisherman who is coming into some money. Chet and eventually Biff are there to help, too. Then there is the missing astronaut...
I, of course, read all the Hardy Boys that had been published back when I was a kid, but they are fun to re-visit. I wonder about the differences between the original editions and the "modernized" ones. This one has transistor radios, which I'm sure were not around back in the 1928 original. In fact, I read that the original edition is rather different than the newer one.
Stolen stuffed animals, ham radio (on 2 meters?), Chet's new hobby of taxidermy, and industrial sabotage. I first read this back in the 60s, but this edition seems to be different than the one I read. No "Help Hudson", no beating the Lynx with an walkie-talkie antenna!