The Coffin Quilt: The feud between the Hatfields and the McCoys, by Ann Rinaldi, is a young adult book published by Gulliver Books Paperbacks in 2001. Gulliver is an imprint of Harcourt Trade Publishers, which is a division of Houghton Mifflin Harcourt, Inc.
Harcourt's corporate office is in San Diego, CA, but they also have a New York City office.
While the publisher is located in the United States, the book itself was most likely printed somewhere in Asia, where production costs are lower.