Wall Around a Star

Blurb

Wall Around a Star is the second book of the Saga of Cuckoo series, following Farthest Star. The author is Frederik Pohl, in collaboration with Jack Williamson. The book was published by Del Rey Books on January 12, 1983, with an ISBN of 0-345-28995-1. The cover art for the 1983 edition was done by David Mattingly.
In this novel linguist Jen Babylon is called on to translate alien records which may explain the nature of "Cuckoo", a sphere built around a star, and thus save the galaxy.