I took this idea one step further by adding "page 2" of my recently created catalog. Put it on a layer behind the cover and flip the graphic horizontally. Then, do the warp feature on the cover. Perform the warp again on your second layer. Delete the warp effect on the cover to show page two in the "triangle". Continue on as described in the step by step. (I'm not as good at describing things as the original author - but I'm sure you understand.) This will make the final graphic look more like you're actually turning the page for real. Thanks for all the great ideas!!
~Lynn