How many books are in the Solstice Quartet series?

There are 4 books in the Solstice Quartet series.

When will the next book in the Solstice Quartet series be released?

The Solstice Quartet series does not have a new book coming out soon. The latest book, Trina's Sacrifice (Book 4), was published in July 2023.

The first book in the Solstice Quartet series, Ember's Secret, was published in February 2015.