She by H. Rider Haggard audiobook.
At 5 years old Leo Vincey is left in the care of a Cambridge professor by the name of Horace Holly. His father leaves him a strange casket which he is to open on his 25th Birthday. On opening the Casket Leo and Horace discover the strange history of Leo's ancestors. Leo and his adoptive father Horace must travel all the way to Africa in order to uncover the solve his family's strange history.