Wall Around A Star is the second book of the Saga of Cuckoo

Saga of Cuckoo

Saga of Cuckoo is a series of science fiction novels by Frederik Pohl and Jack Williamson. It consists of two novels:*Farthest Star *Wall Around A Star -Themes:...

series, the first of which was Farthest Star

Farthest Star

Farthest Star is the first novel of the Saga of Cuckoo Series. The author is Frederik Pohl, in collaboration with Jack Williamson. It was published by Ballantine Books in 1975....

. The author is Frederik Pohl

Frederik Pohl

Frederik George Pohl, Jr. is an American science fiction writer, editor and fan, with a career spanning over seventy years — from his first published work, "Elegy to a Dead Planet: Luna" , to his most recent novel, All the Lives He Led .He won the National Book Award in 1980 for his novel Jem...

, in collaboration with Jack Williamson

Jack Williamson

John Stewart Williamson , who wrote as Jack Williamson was a U.S. writer often referred to as the "Dean of Science Fiction" following the death in 1988 of Robert A...

. The cover art for the 1983 edition was done by David Mattingly. http://www.iblist.com/book19581.htm

Cover Blurb

Butterflylike aliens had brought Earth into the galactic culture, but she was a poor relation, valued only for the living human bodies she rented out for whatever purpose her nonhuman customers desired. Then Cuckoo was discovered. Millions of miles in diameter, less dense than air, it had a solid surface that was home to many races — including a species of Man. And that was odd, for Cuckoo was from another galaxy! Suddenly, one human, a linguist, became very important. If Jen Babylon could solve the mystery of Cuckoo's records he might raise humanity's standing among the older races —and he might also save the galaxy!

• Publisher. Del Rey Books
  Del Rey Books
  Del Rey Books is a branch of Ballantine Books, which is owned by Random House and, in turn since 1998, by Bertelsmann AG. It is a separate imprint established in 1977 under the editorship of author Lester del Rey and his wife Judy-Lynn del Rey. It specializes in science fiction and fantasy...
  
  (January 12, 1983), ISBN 0-345-28995-1.