This series explores the Summer-Land, the spirit world that co-exists with this one, the veil between life and death.
"There is a class of persons in the Spirit-World who are great travelers. They are almost like our gipsies. They form themselves into affinitive groups, and, harmonizing with the circulating rivers between the different planets, go on protracted journeys through innumerable scenes, and do not return to their pavilions for many years. ... She had joined the group of excursionists, without knowing whither they were going."
-"Scenes in the Summer-Land", Andrew Jackson Davis