Orbitsville

Blurb

Orbitsville, published in book form in 1975, is a science fiction novel by Bob Shaw about the discovery of a Dyson sphere-like artifact surrounding a star.
The novel had previously appeared in three instalments in Galaxy Science Fiction, in June, July and August 1974. After its publication as a book it won the British Science Fiction Award for the best novel in 1976.
Shaw wrote two sequels, Orbitsville Departure, published in 1983, and Orbitsville Judgement, published in 1990.