Some days, it's just harder to work in the library...
...especially when a gorilla wants a book!
We learn the "Secret Of The Man-Ape!" in Strange Adventures #75 (December, 1956) by writer Otto Binder, penciller Carmine Infantino and inker Joe Giella, all under this stunner of a cover by Gil Kane and Bernard Sachs.
Hint...aliens are involved.
Not to be outdone, the story found its way into From Beyond the Unknown #23 (July-August, 1973) with a cover by Nick Cardy.
Now, how could Robinson Crusoe, Moby Dick and Treasure Island allow you to take over the world?