Hawaiian Sea Hunt Mystery: A Biff Brewster Mystery Adventure

Good book, pictorial covers, no dust jacket as issued. Cover has light wear; number in ink on half title page. Otherwise, pages clean and unmarked. Grosset and Dunlap hard cover, 1960 edition but 1964 printing, Biff Brewster #3, 182 pages. 8vo (5" x 7.5") Titles on back cover thru Biff Brewster #10, Mystery of the Tibetan Caravan. In 1964, Grosset and Dunlap changed to pictorial covers from the prior plain boards and dust jacket format, beginning with #11 British Spy Ring Mystery and including reprints of earlier volumes. Since the title of #11 is not listed, an early 1964 printing date is assumed for this book. Why is Biff Brewster's father so eager to leave for Hawaii? Is there more than just a mining engineers' conference afoot? The elder Brewster is strangely silent, and Biff can only guess at the cause of his father's sudden anxiety. In this third exciting mystery adventure of the Biff Brewster series, the entire Brewster family flies to festive, exotic Honolulu where a startling newspaper headline involves Biff and his lather in a hair-raising race to locate a kidnapped scientist, a sunken sloop, and a cache of precious Cesium, a rare mineral essential to rocket propulsion and the conquest of the moon. With the help of his new friend, Likake Mahenili, Biff soon learns that more than sharpened wits are necessary to defeat the mysterious forces working against them.