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undersea colonies

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Cover of Rip Tide by kat falls

Rip Tide

By Kat Falls

Cover of Missing man by katherine maclean

Missing man

By Katherine MacLean

Cover of Revelations by j. a. souders

Revelations

By J. A. Souders

Cover of The Neptune Challenge by polly holyoke

The Neptune Challenge

By Polly Holyoke

Cover of Above World (Above World #1) by jenn reese

Above World (Above World #1)

By Jenn Reese

Cover of Horizon (Above World #3) by jenn reese

Horizon (Above World #3)

By Jenn Reese

Cover of The Neptune Project by polly holyoke

The Neptune Project

By Polly Holyoke

Cover of Undersea colonies by dennis chamberland

Undersea colonies

By Dennis Chamberland

Cover of Renegade by j. a. souders

Renegade

By J. A. Souders

Cover of Above World (Above World #1) by jenn reese

Above World (Above World #1)

By Jenn Reese

Cover of Follow the whales by carl l. biemiller

Follow the whales

By Carl L. Biemiller

Cover of Against the Tide by j. elle

Against the Tide

By J. Elle

The Neptune promise

The Neptune promise

By Polly Holyoke

Cover of Mirage (Above World #2) by jenn reese

Mirage (Above World #2)

By Jenn Reese

Aquatlantic

Aquatlantic

By Giorgio Carpinteri

Cover of Low by rick remender

Low

By Rick Remender

Cover of Low by rick remender

Low

By Rick Remender

Cover of Mirage (Above World) by jenn reese

Mirage (Above World)

By Jenn Reese

Cover of Dark Life (Dark Life #1) by kat falls

Dark Life (Dark Life #1)

By Kat Falls

Cover of The Neptune Conspiracy by polly holyoke

The Neptune Conspiracy

By Polly Holyoke

Cover of Rip Tide (Dark Life #2) by kat falls

Rip Tide (Dark Life #2)

By Kat Falls