These ghostly visions date back to the mid-1600s when Sarah's Irish immigrant ancestors, former indentured servants, built the house.

The ability of a neighboring family to see premonitions of the future allows for time-bending possibilities Sarah and her loved ones must choose either to pursue or reject.

On July 7, 2017, an "anniversary announcement" on the series' official website and official Facebook page, celebrating the anniversary of the publication of Neverwas, also announced that the mother-daughter writing trio had decided to "halve" their manuscript for Otherwhen in order to, among other things, show Sarah during all four seasons of her first year in Amber House, bringing things "full circle.

The current anticipated release date for this novel is 2018 or 2019, according to statements made by the authors on the book series' official Twitter and Facebook accounts.

The title of the final installment is a reference to the poem penned by Sarah's great-grandmother Fiona, featured in the first book of the series.