Glass Cloud (Unabridged) [Unabridged Fiction‪]‬

Phillip Wing is the architect of one of the Seven New Wonders of the World: the Glass Cloud. But construction has fallen behind schedule, costs have skyrocketed, and the project is suddenly in danger of being canceled. The mysterious alien Messengers step in to save the Glass Cloud but at a terrible cost to Wing and his wife, Daisy.
Author James Patrick Kelly is a two-time winner of the Hugo Award and a 2007 Nebula Award winner. His stories appear frequently in Asimov's Science Fiction, and he writes the magazine's "On the Net" column. Publishers Weekly has called him "a meticulous craftsman in the demanding short-story form".