Internet Archive: U2 into the heart. New York, NY : Thunder's Mouth Press ; Berkeley, CA : Distributed by Publishers Group West, 2001, ISBN 978-1-56025-314-3 (archive.org [abgerufen am 4. Juli 2021]).
Internet Archive: U2 FAQ : anything you'd ever want to know about the biggest band in the world-- and more! Milwaukee, WI : Backbeat Books, 2010, ISBN 978-0-87930-997-8 (archive.org [abgerufen am 4. Juli 2021]).