Venus on the Half-Shell by Kilgore Trout
1974 mass-market paperback in excellent condition. Simon Wagstaff is the Space Wanderer, a seeker of truth and electric banjo player who narrowly escapes the Deluge that destroys Earth when he happens upon an abandoned Chinese spaceship, the Hwang Ho. A man without a planet, he gains immortality from an elixir drunk during a sexual interlude with a cat-like alien queen in heat. Now, with his pet owl, his dog Anubis and a sexy robot companion, Simon charts a 3,000-year course to the most distant corners of a multiverse full of surprises to seek out the answers to the questions no one can seem to answer.