Michael O'Mara · Reader's Digest Association
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| As Easy As Pi: Stuff about numbers that isn't maths | 978-1-84317-355-7 (1-84317-355-7) | 2009 |
| Easy as Pi: The Countless Ways We Use Numbers Every Day | 978-1-60652-134-2 (1-60652-134-9) | 2010 |