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THE SECRET OF THE SAPPHIRE SENTINEL Is Here!

Today is publication day for my latest book, the sci-fi fantasy adventure, THE SECRET OF THE SAPPHIRE SENTINEL!

Jendia Gammon

21 Oct 2025 — 4 min read

I'm so happy to announce the publication day for THE SECRET OF THE SAPPHIRE SENTINEL! This is the sci-fi and fantasy young adult sequel to my Nebula & BSFA Award finalist, Lodestar longlisted THE INN AT THE AMETHYST LANTERN. Out now via Android Press.

About THE SECRET OF THE SAPPHIRE SENTINEL

This is the second installment in The Amethyst Lantern Series!

In the twilight world of Glimmerbight, fourteen-year-old Gen Lightworth dreams of restoring the Inn at the Amethyst Lantern. But an ancient evil’s lingering scars awaken new threats from unexpected corners.

Summoned by the mysterious Gallant Twilight Society—a network of heroic animals—Gen journeys beneath the waves into hidden lairs pulsing with bioluminescent secrets. With her loyal team, the Fireflies, she confronts lost legacies, mutated monsters, and shadowy figures from the past.

When a vibrant yet unsettling new apothecary arrives, secrets multiply and trust frays. And as danger closes in, Gen learns the true weight of leadership and the strength of friendship.

Filled with wonder, bravery, and the luminous bonds of community, The Secret of the Sapphire Sentinel continues the saga begun at The Inn at the Amethyst Lantern. Join this unforgettable adventure where light battles darkness and friends must navigate mysteries beneath the stars.

Purchasing Links

You can order THE SECRET OF THE SAPPHIRE SENTINEL from your favorite bookseller! Or, you can find links for purchasing here:

Android Press (paperback)
Android Press (hardcover)
Android Press (ebook)
Amazon (US) (paperback)
Amazon (US) (Kindle ebook)
Amazon (UK) (Kindle ebook)
Apple Books (ebook)
Barnes & Noble (paperback)
Barnes & Noble (ebook)
Blackwell’s (UK) (paperback)
Books-A-Million (paperback)
Bookshop.org (paperback)
Bookshop.org (ebook)
Booktopia (Australia) (paperback)
Booktopia (Australia) (ebook)
Indigo (Canada) (ebook)
Kobo (ebook)
Powell’s Books (paperback)
Waterstones (paperback)

BOOK SIGNING This Saturday!

I'm pleased to announce that I'm signing THE SECRET OF THE SAPPHIRE SENTINEL this Saturday at Underdog Bookstore in Monrovia from 1 PM - 3 PM! Head here for more details:

Expanding the Universe

It's amazing to think I have another book series out in the world! And you get one more book in the series, when the prequel, THE DAWN OF DUSK AND TWILIGHT arrives in one more year! In fact, I'm writing that book now.

This new book offers more adventures in the future Lunarpunk world of Gen Lightworth and her fellow teens, the Fireflies, as they uncover more mysteries and learn about the world that was ours. Expect hijinks, talking animals, teen angst and even some romance, immersive world-building, and camaraderie. It's just the hopeful book you've maybe been looking for.