Books like Tarzan and the Lost Empire

So once again Tarzan has found a lost city in Africa. Man, there sure a lot of lost cities there. This one is ancient Romans, and Tarzan discovers the cities while he's searching for the lost son of a friend. Overall not bad but honestly it just feels like we've been here before. Two lost cities at war, Tarzan in the middle, yadda yadda. That being said, the fact it was ancient Romans was pretty cool and the story wasn't bad. I guess it's a matter of either you like Tarzan or you don't, because the stories don't really vary all that much it seems.