John Buchan 
Prester John 

Fans of H. Rider Haggard's action-adventure novels will be swept away by John Buchan's Prester John, a thrill-a-minute tale set in colonial Africa. Young David Crawfurd travels to Africa to make a quick buck as a merchant, but the ambitious entrepreneur soon finds himself caught in the middle of an uprising—and under the sway of a charismatic rebel leader with a mysterious past.