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Vernor Vinge: A Deepness in the Sky (Zones of Thought series Book 2) (2007, Tor Books) 5 stars

A Deepness in the Sky is a science fiction novel by American writer Vernor Vinge. …

Excellent 2nd book in the Zones of Thought series

5 stars

Start with a single planet orbiting a white dwarf star nicknamed the OnOff star because it is consistently dormant 215 out of every 250 years. Add in a sentient species that survives on the planet. Finally toss in two competing, space faring groups of humans come to investigate. Mix well and enjoy the result!