Robert J. Schadewald (1943-2000), a former president of NCSE's board of directors, was working on a manuscript about the history of the flat-earth movement until the week of his death. Now, thanks to his sister Lois Schadewald and his widow Wendy Schadewald, a final version of The Plane Truth is freely available on-line in web and ebook formats.
Writing at the Skeptical Society's Insight blog (November 19, 2015), Daniel Loxton comments, "During his life, Bob Schadewald was the world's leading skeptical expert on the history of flat-Earth advocacy. ... Always there is more to learn. But we who are left to continue that work are richer today, for we have Bob Schadewald's last gift to the scholars of the weird."