George A. Birmingham 
Island Mystery [PDF ebook] 

This fast-paced novel is a fun, frivolous read about a quintessentially American girl, Daisy Donovan, whose chief aim in life is to become a queen. Through a series of far-fetched coincidences and circumstances, her hopes come to pass, and Daisy is enthroned as the ruler of a tiny, out-of-the-way island community called Megalia. But before long, the queen finds herself at the center of an international crisis. Will she emerge unscathed and continue her reign?