Equinox books in order

All books in the Equinox series by Lily Harlem in reading order. A sci-fi romance series set on Planet Athion featuring alien heroes and human heroines.

Reading order

# Title Published Author Buy on Amazon
1 Traveler; Planet Athion TBD Lily Harlem N/A
2 Traveler 2018 Lily Harlem Buy
3 Dreamer 2018 Lily Harlem Buy
4 Seducer 2019 Lily Harlem Buy

The Equinox series by Lily Harlem is a sci-fi romance trilogy set on Planet Athion, a world connected to her larger Planet Alpha universe. Published in 2018 and 2019, the books follow human women who find themselves on an alien world with powerful, possessive heroes.

With titles Traveler, Dreamer, and Seducer, the series explores different facets of life on Athion and the bonds that form between species. Readers who enjoy Harlem’s Planet Alpha books will find familiar themes here, with alien world-building, cultural clashes, and intense romance at the center of each story.

Frequently Asked Questions

How many books are in the Equinox series?

There are 4 books in the Equinox series, published between 2018 and 2019.

What is the Equinox series about?

The series is set on Planet Athion, a world connected to Lily Harlem’s broader sci-fi romance universe. Each book follows a different couple as they navigate an alien society and their growing attraction.

Is the Equinox series connected to Planet Alpha?

Yes. The Equinox series is set on Planet Athion, which exists in the same sci-fi universe as the Planet Alpha series. Readers familiar with Planet Alpha will recognize the broader world-building.

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