It seems that Kochalka's big collection of his American Elf comic strips is coming out in July! 520 pages of pure comic goodness. It sounds like a perfect toilet book to me too, because you could just flip to a strip and have a quick laugh or a nice moment and get on with the day. Although, I feel a bit of a dilemma on hardcover or softcover. Hardcover is more expensive, but softcover spines break more easily, which is a problem in a book this size, or even any books at all.
My copy of Life of the Party has a broken spine, and while no pages are falling out, it is still fairly annoying. This is not a large book- it is 96 pages.