Karen Mutton is a Australian writer(a) who has written books and articles on a range of ‘alternative’ or ‘fringe’ subjects. Her 2009 book, Sunken Realms, is a comprehensive examination of known sunken cities, harbours and roads. Included in her survey are crannogs, which are artificial islands constructed in lakes. She refers to the crannogs of Scotland, ignoring the Irish examples which total around 1,200 or nearly three times the Scottish number.
She devotes a somewhat disproportionate amount of space to an extensive review of Atlantis theories, without offering anything new. Google Books have a considerable amount of this book online(b).