Geneviève Behrend was student of Thomas Troward who later became a writer and public speaker who toured the United States, speaking in New Thought churches as early as 1919 and as late as 1944. Click here to see the full text, audio and PDF of the 1921 edition of her much loved book, Your Invisible Power.
Wikipedia has a good biography of Geneviève Behrend. This page is a placemarker for any biographical information I find that is not available there.
