Will Rees, and many of the mysteries, are based in Maine. It is still the home of the last remaining Shaker community with living Shakers. At the time of Will Rees, Maine was part of the Commonwealth of Massachusetts. In 1820, Maine voted to secede from Massachusetts and in the Missouri Compromise of that year, Maine entered the Union as a free state while Missouri joined as a slave state.

It is theorized that the Vikings interacted with the Penobscot tribe in 1000. If confirmed, it would make Maine the earliest site in the entire U.S. with European contact. The first confirmed contact was in 1604 with French explorers, many of whom gave their names to locations especially on Mount Desert Island; e.g Samuel Champlain. Despite its large geographical area, it is the least populous state east of the Mississippi.

Sabbathday Lake was the smallest and poorest of all the Shaker communities. However, it is still in operation in Alfred, Maine, although with only a few Shakers remaining.