Protector vintage paperback book by Larry Niven circa 1981 about space warefare and saga of Brennan the Belter and Phssthpok the Pak scifi

Phssthpok the Pak had been traveling for most of his thirty-two thousand years. His mission: save, develop, and protect the group of Pak breeders sent out into space some two and a half million years before...

Brennan was a Belter, the product of a fiercely independent, somewhat anarchic society living in, on, and around an outer asteroid belt. The Belters were rebels, one and all, and Brennan was a smuggler. The Belt worlds had been tracking the Pak ship for days -- Brennan figured to meet that ship first...

He was never seen again -- at least not by those alive at the time.

CONDITION: VG- **PLEASE SEE PICTURES.