A very intriguing title of a recent article (
Sunken City 12,000 Years Old, Asserts Author, Possibly Part Of Lost Continent Of Mu) does not exactly provide the author's name or any new proof, but it does provide a decent history of Nan Nadol.
It also presents:
Nan Madol was one of the sites James Churchward identified as being part of the lost continent of Mu, starting in his 1926 book The Lost Continent of Mu Motherland of Man.
Have a great day.