The Neptune Project Books In Order

Publication Order of All The Neptune Project Books

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1. The Neptune Project

Polly Holyoke

Published 2013|340 pages

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2. The Neptune Challenge

Polly Holyoke

Published 2015

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3. The Neptune Promise

Polly Holyoke

Published 2017|322 pages

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Other Series

The Elpis

Oceans of Red

Ghost Mountain Wolf Shifters