A World Out of Time

Not related to any other series with the exception of the Integral Trees Series, this Niven book is an all time favorite of mine. I still re-read it. It orginated from a short story called Rammer about a corpsicle that is thawed into body for a series of rigorous tests ina future distopian state. He eventually passes and gets the job of seeder pilot on a ramship. The story is adapted into a Novel here and takes on new life. Our hero defines the state after leaving the solar system. He re-programs his ship to take him on a long trip back to earth arriving back in the far earths future. The solar system is a little unreconizable, due to the war between the boys and the girls. but earth is still habitable with a few oddities like the cat snake featured on the books cover. After a few pitfalls our hero discovers immortality and unites the sexes after a few millenia of conflict.