Frank Ridley
Source: An undated pamphlet published by the Engels Society, 21 Lime Tree Road, Heston, Middlesex. By internal evidence, it was probably published in the late 1940s. Scanned and prepared for the Marxist Internet Archive by Paul Flewers.
Part I: The Origins and Nature of Religion
I: The Two Roots of Religion
II: Natural Religion
III: Supernatural Religion
I: Religion and the Class War
II: The Churches and Society
III: Religion and Socialism