"The Adversary" by Julian May is a science fiction novel published by Ballantine Books in 1985. The mass market paperback features a cover by Michael Whelan and weighs 9.5 ounces. The story is part of the science fiction genre and is known for its action and adventure elements, as well as its hard science fiction elements. With its English language text and intriguing plot, this book is sure to captivate readers who enjoy the fast-paced world of science fiction.