''Summertide'' (1990) is a

science fiction Science fiction (sometimes shortened to Sci-Fi or SF) is a genre of speculative fiction which typically deals with imagination, imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, Paral ...

novel by American writer

Charles Sheffield Charles Sheffield (25 June 1935 – 2 November 2002), an English-born mathematician, physicist and science-fiction writer, served as a President of the Science Fiction and Fantasy Writers of America and of the American Astronautical Society. ...

, the first of his series of

Heritage Universe Heritage may refer to: History and society * A heritage asset is a preexisting thing of value today ** Cultural heritage is created by humans ** Natural heritage is not * Heritage language Biology * Heredity, biological inheritance of physical ...

. The story takes place millennia in the future, with humans having extensively colonized our

spiral arm Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''Milky Way The Milky Way is the galaxy that includes our Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked ey ...

and having encountered a number of intelligent

alien race Extraterrestrial life, colloquially referred to as alien life, is life that may occur outside Earth and which did not originate on Earth. No extraterrestrial life has yet been conclusively detected, although efforts are underway. Such life might ...

s. Littered throughout the

galaxy A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar Sys ...

are hundreds of massive abandoned engineering projects built by a mysterious race, referred to as The Builders, extinct for three million years. An eclectic group of scientists and opportunists are descending upon one such artifact at a time when its surrounding environment is extremely dangerous to study an unusual phenomenon. The novel includes excerpts from the ''Lang Universal Artifact Catalog (Fourth Edition)'', describing several Builder artifacts. ''

Divergence In vector calculus, divergence is a vector operator that operates on a vector field, producing a scalar field giving the quantity of the vector field's source at each point. More technically, the divergence represents the volume density of t ...

'' is the next book in the series.

Reception

Publishers Weekly ''Publishers Weekly'' (''PW'') is an American weekly trade news magazine targeted at publishers, librarians, booksellers, and literary agents. Published continuously since 1872, it has carried the tagline, "The International News Magazine of ...

states that the "'series stands on its own, even though many threads are left dangling." Kirkus Reviews calls it an "above-average space opera".

References

1990 American novels Novels by Charles Sheffield 1990 science fiction novels American science fiction novels {{1990s-sf-novel-stub