Moominpappa at Sea is a loose reference to a novel written by what American author?
Moominpappa at Sea:  The original title is a loose reference to Hemingway novel "The Old Man and the Sea", though this is not reflected in the translation. The Old Man and the Sea: The Old Man and the Sea is a short novel written by the American author Ernest Hemingway in 1951 in Bimini, Bahamas, and published in 1952.
Ernest Hemingway