ISBN 978-0-19-280723-6 (Concise introduction for lay reader)* Marcus du Sautoy, "Finding Moonshine: a Mathematician's Journey through Symmetry", Fourth Estate, 2009
ISBN 978-0-19-280723-6 (Concise introduction for lay reader)* Marcus du Sautoy, "Finding Moonshine: a Mathematician’s Journey through Symmetry", Fourth Estate, 2009