RingworldBy: Larry Niven Series: S. F. MASTERWORKS 'Magnificent' James Blish 'Niven has ideas the size of planets' Time Out Pierson's puppeteers, strange, three legged, two headed aliens, have discovered an immense structure in a hitherto unexplored part of the universe. Frightened of meeting the builders of such a structure, the puppeteers set about assembling a team consisting of two humans, a puppeteer and a kzin, an alien not unlike an eight foot tall, red