"Exceptional freshness and suspense . . . full of startling revelations about human and puppeteer politics."
""A new Known Space book, particularly one with new information about Puppeteers and their doings behind the scenes of human history, needs recommending within the science fiction community about as much as a new Harry Potter novel does - well, anywhere. But Niven and Lerner have produced a novel that can stand on its own as well as part of the Known Space franchise."
"A far-future SF mystery/adventure set two centuries before the discovery of the Ringworld by humans. . . . . Intriguing human and alien characters and lucid scientific detail."
"A very worthy addition to the ongoing Known Space future history."