Gass's second novel, considered his magnum opus, was in development for almost thirty years, with excerpts published in multiple places over that time, until its publication as a novel by Knopf in 1995. This section features artwork, drafts, recordings, and much more, covering the multi-faceted history behind this unique book. 

In 2020, on the occasion of the 25th anniversary of the publication of The Tunnel, Ted Morrissey organized The Tunnel at 25: An Online Symposium, which features new analyses from a variety of readers.