He is author of a number of books including The Seeker's Handbook: The Complete Guide to Spiritual Pathfinding (Crown, 1991), Twins and the Double (Thames & Hudson, 1993), The Hero - Manhood and Power (Thames & Hudson, 1995), Quest for the Zodiac (Starhenge Books, 1999) and Not in His Image (Chelsea Green Publishing Company, 2006). His work focuses on Gnosticism and the myth of Sophia.
^MacDonald, G. Jeffrey (March–April 2007). "Supplement Feature: Flash Points: Publishers Both Spark and Illuminate Religion Debates". ForeWord. "And if that’s not enough diversity on the pro-environment bookshelf, mythologist John Lamb Lash has a book to help unpack pre-Christian paganism and its promise for building kinship between humans and earth. Not in His Image: Gnostic Vision, Sacred Ecology and the Future of Belief (Chelsea Green, 978-1-931498-92-0) blames Christianity’s focus on a father god for setting in motion historical patterns of destruction. A more earth-friendly politics, Lash suggests, would likely emerge from greater attention paid to pagan myths and goddess worship."