The Secret Treasure: New Adventure Novel: Adventure Novels 2021

The adventure genre consists of books where the protagonist goes on an epic journey, either personally or geographically. Often the protagonist has a mission and faces many obstacles in his way. ... The adventure genre often pairs up with the action genre, since long epic journeys have a lot of action in them.
Improbable and fable-like, the story tells of English adventurers who travel to the interior of a remote African country, a vanished empire with legends of lost treasure.