Following a sold out run in London’s West End, the celebrated young adult novelist and stand-up performer Eoin Colfer is taking his live show, “Fairies, Fiends and Flatulence,” on tour throughout the United States in July. The author will appear at 7 p.m. Tuesday, July 15, at Tivoli Theater, 5021 Highland Ave., Downers Grove, and 6 p.m. Wednesday, July 16, at La Grange Theater, 80 N. La Grange Road, La Grange.