The story also exists in an (original) Swedish version, and is actually sold at the Vasa Museum in Stockholm, Sweden. That's the world-famous museum which houses, yes you guessed it, the actual shipwreck of the royal warship! It sank in Stockholm's waters in 1628, was successfully salvaged in 1961, and has now become something of a weird symbol of Sweden, with the government-owned museum being visited by thousands of people each year. How many of them buy Björn Bergenholz' story is, alas, unknown to me.
Three stars. Now, let's eat a ham sandwich!