Time Castaways 1 The Mona Lisa Key by Liesl Shurtliff The Mona Lisa Key by Liesl Shurtliff (Katherine Tegen Books, September 2018).
Time Castaways 2 The Obsidian Compass by Liesl Shurtliff The Obsidian Compass by Liesl Shurtliff (Katherine Tegen Books, October 2019).
Time Castaways 3 The Forbidden Lock by Liesl Shurtliff The Forbidden Lock by Liesl Shurtliff (Katherine Tegen Books, October 2020).