The Secret of the Sapphire Sentinel by Jendia Gammon, writing as J. Dianne Dotson, is the sequel to the Nebula and BSFA Award finalist The Inn at the Amethyst Lantern. This is the second book of a trilogy.

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.

Start the Lunarpunk adventure with The Inn at the Amethyst Lantern! And you can follow both with the 2026 prequel, The Dawn of Dusk and Twilight.