Michael Avallone & Jerry Pournelle 
The Planet of the Apes Omnibus 1 

When men discovered that the Planet of the Apes was their own Earth, it was only the beginning of the most incredible adventure of all time. The first omnibus features captivating novelizations of the classic movies Beneath the Planet of the Apes and Escape From the Planet of the Apes

Circa l’autore

Jerry Pournelle has been a full-time science fiction writer since 1972, and was once involved with the US space program.