The Door of No Return

Zac Baxter's grandfather has always told him that he's the descendant of African kings, whose treasure was stolen when his ancestors were sold into slavery. Of course, Zac brushes this off as a tall tale -- until his grandfather is murdered and their apartment is completely ransacked. Clearly somebody is after something.
Heeding his grandfather's dying words, Zac is off to Ghana to track down his family's history. But what did his grandfather mean when he said that Zac had the map to the tr...