Anne is a pilot for an airline plagued by labor disputes, financial problems, and lawsuits. But it pays enough for Anne to raise her daughter after a bitter divorce from her emotionally unstable and violent ex-husband, Cal. When Cal escapes from an asylum, he puts his plan for revenge into action--29,000 feet above the ground.

Altitude Zero 2000,, Lincoln

ISBN-13: 9780595144518

Trade paperback

Altitude Zero 1993, Jove Books

ISBN-13: 9780515112702

Mass-market paperback

Altitude Zero 1991, W. W. Norton & Company, New York, NY

ISBN-13: 9780393029895