The terrible western cartoon artwork gracing "How to Draw Manga" books are beaten in the shitstakes by the amateurish cover to "How to Cheat in Photoshop CS3: The art of creative photorealistic montages."
Looking like something tossed off in five minutes for a Worth1000 or SA forum thread, the image is a mash of ill-cropped components, sharp edges and woeful colorization, with the spatial relationships of a popsicle shadow play. And ... why is there a giant hole in his left elbow? "Photorealistic montages" indeed–fourth edition!
Be sure to read the creepy reviews at Amazon. Here's the apparent original, fished out by a commenter at the original post...
How To Cheat In Photoshop By Reason Of Mental Illness [Photoshop Disasters, via a similarly horrifying work featured at the motherboing.]