I read almost all of the original Hardy Boys mysteries as a kid, but by the time the last few appeared I wasn't a kid anymore and so this is the first time I've read this 55th (out of 58) one. It was produced by the Stratemeyer Syndicate and published in 1976 by Grosset & Dunlap in the iconic blue hardbound format. The book was written by Andrew E. Svenson and Vincent Buranelli but appeared, of course, under the Franklin W. Dixon house pseudonym. The back cover says it's for "Anyone from 10 to 14," but I'd say average readers from 8 to 12 might be more appropriate. (For years and years, the back cover said the books were for boys, so the change to "anyone" was significant... just like Kirk's Enterprise went where no "man" has gone before but Picard's was for every "one".) In the story, Frank and Joe go to England to help their father investigate a museum theft. There are some spooky and well described bits of made-up with-lore, and it's a pretty well contrived kids' mystery. On the other hand, there are some silly bits of obvious coincidence, and England and Ireland as they are described don't seem to be much bigger than the Brant's Spindrift Island. For example, they just drive right up to Stonehenge and climb about, London doesn't seem much bigger than Bayport, and when they go to Ireland, they just happen to bump into a couple of their pals who are vacationing there. Oh well... I probably would have enjoyed it a lot when I was in the third grade.