Echoes of Darkness

Award Winning Echoes of Darkness, Book Two in the Echoes Trilogy, Sonar Press

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The decades-long conflict with the Wardens, the genocidal faction of alien Echoes that started the war on Earth in 2069, rages on. Dani, an Echo, fights alongside humans and other aliens against the Wardens. As the bond of her newfound family strengthens, she continues to struggle to find a viable solution to retake Boston from the Wardens.

Maine’s civilian and Commonwealth military alliance against the enemy remains intact, but Dani’s relationship with Colonel Houston becomes more strained with rogue Warden attacks, unreliable intelligence reports, and the high casualty counts that will come when they move on the enemy stronghold in the city.

Rowan’s unwavering ambition to eliminate all humans from Earth, rise within Warden ranks, and capture Dani drives him to commit treason. When Dani learns that Rowan is behind an assault in Maine that wounds and kills several people on the Commonwealth base, her well-orchestrated plan against Boston is replaced with one focused only on rescue … and revenge.


“Campbell includes the same non-stop action and intrigue as the first book, plus adds new layers to this alien/human war, which can eerily seem familiar in our modern landscape.”

— Geeks of Doom

“Readers will find this book as hard to put down as the first in the series.”

— Booklist

“… anyone who likes a good tale of alien occupation, Cheryl Campbell’s Echoes series is a good choice.”

— Analog Science Fiction & Fact

“Fans of post apocalyptic, military sci-fi with strong female protagonists are going to want this series.”

— IBPA Judge’s Feedback, 2021





Foreword Indies Finalist, IBPA Benjamin Franklin Award Silver, Next Gen Indie Book Awards Finalist Sci Fi and LGBTQ+, Eric Hoffer Award Finalist, American Fiction Awards Finalist SciFi – Post-Apocalyptic fiction



Order from your local bookstore (such as PRINT in Portland, ME), Amazon, IndieBound, or Barnes and Noble today!