Georges Perec followed his masterful novel La Disparition, a lipogram without the letter E, with Les Revenentes, which avoided all vowels except E. And Les Revenentes is hilarious, bending all rules of grammar, spelling, and syntax in its rigorous pursuit of univocalism (and becoming increasingly smutty in the process).
But there is a stray O. It was apparently not intentional, just a typo. Remember, univocalists: be diligent! It’s on page 81 of my copy (Julliard, 1991).