Home › Authors › Mabel J. Henderson 👤 Mabel J. Henderson 4 books Books by Mabel J. Henderson i know a secret 1988 Workbook to accompany the Stor Workbook to accompany the Story road 1948 I KNOW A SECRET , EASY GROWTH I KNOW A SECRET , EASY GROWTH IN READING, PRIMER LEVEL ONE 1947 I Know a Secret (Easy Growth i I Know a Secret (Easy Growth in Readings 1940