Rapture

From Author Wars - https://authorwars.com/publications/rapture-375543.html

Overview:

Title: Rapture
Author: Thomas Tessier
Year: 1987
ISBN-10: 0689118813
Publisher: Atheneum
Price: $20.95
Pages: 310
Binding: Hardcover
Type: Novel
Title Reference: Rapture
Notes: 1st edition. Information on this book from The Whole Science Fiction Data Base 8, ABE and WorldCat. Back flap of Archive.org copy says "Jacket design" and there is no signature on the cover, but artwork is in the same style as Steinberg's other credits on ISFDB and so is likely by him.