Jack London 
Hearts of Three [EPUB ebook] 

Francis Morgan, a wealthy heir of industrialist and Wall Street maven Richard Henry Morgan, is a jaded young New Yorker. When his father’s business partner Thomas Regan suggests that Francis take a holiday in Central America, ostensibly to search for the treasure of the Morgans’ legendary ancestor, Francis thinks it’s a splendid idea. But he never suspects what adventures await across the border…