Holyoke, Polly
Chronological Checklist

Series – The Neptune Project

4 titles
• The Neptune Project (New York: Hyperion Books, 2013)
• The Neptune Conspiracy (London: Puffin Books, 2014)
• The Neptune Challenge (New York: Hyperion Books/Disney, 2015)
• The Neptune Promise (place not given: Holyoke Books, 2017)