Jelly vs. Jam By Gregory McNamee You need an active subscription to view this contentYou should really subscribe now!Or login if you already have a subscription. Share — Issue: Spring 2015 / Volume 91/2 Published: April 1, 2015 Gregory McNamee Gregory McNamee is the author or title-page editor of forty books. He is a contributing editor to the Encyclopaedia Britannica and to Kirkus Reviews.