The Sweaty Yeti by Roy Apps
There is a great, hulking, stinking yeti hiding under Jonathan's bed! He must come up with a plan if he's ever going to get his room back (and life as he knew it). But Yeshe, the yeti, is a bashful being. And if things are ever going to return back to normal in Goolish, the Fang Gang are going to have to get him to release his inner beast!