"The Pebbles of Sai-No-Kawara", and one new story, "Blanket Man", the chapbook was printed in 2006, but the publisher did not release the book because of production difficulties with the accompanying wooden and resin box. Of the edition of 200 copies, the publisher sent a number of copies to the author. There are no plans to further distribute the book. From 2001 to 2007, Williamson was the lead singer and guitarist for the Irish duo Fire in the Glen, in which he was partnered with fiddler and bodhranist Tom Knapp. A lifelong member of the Actors' Equity Association, Williamson eventually resumed his acting career, and has performed in plays and musicals at Lancaster's Fulton Opera House and Theater of the Seventh Sister. Williamson portrayed college professor Frederick Miller in the 2006 Fulton Opera House staged reading of "Any Day Now" by David Rush, and Jane Holahan of the Lancaster New Era commented: "These actors were terrific. Williamson, whom I'd only known as an author, was a revelation, infusing Miller with intelligence and great humor." Williamson played a Baltimore Herald reporter as part of the Theater of the Seventh Sister in its 2007 production of "Inherit the Wind," at Millersville University's Rafters Theatre. Laura Knowles of the Lancaster New Era called Williamson one of "quite a few standouts in the stellar cast […] as the Baltimore newsman E.K. Hornbeck, who serves as our cynical conscience, warning us to not accept everything we have been taught and to challenge ourselves to think." Williamson also voices audio books. Susan E. Lindt of the Intelligencer Journal Lancaster also praised his performance: "The biggest standout is Elizabethtown actor Chet Williamson as acidic critic E.K. Hornbeck, the play's version of real-life Baltimore Sun political commentator H.L. Mencken." Lindt added that "Hornbeck makes no bones about being a bottom-feeder, and Williamson is pricelessly snide and smug when he oozes Hornbeck lines". Williamson also appeared with the Theater of the Seventh Sister for their Christmas show in 2007, portraying the narrator in "The Long Christmas Dinner". In 2010, he began recording performances of Andrew Vachss's short stories, as well as some of his own. He has also recorded unabridged audiobooks of several of his novels, as well as works by Michael Moorcock, Tom Piccirilli, and Zoe Winters for Crossroad Press/Springbook Audio. Williamson's 1987 horror novel, Ash Wednesday, was released by Crossroad Press in 2011 as an e-book; an