A Letter to the Luminous Deep

A Letter to the Luminous Deep
By Sylvie Cathrall
Hachette Book Group, 2024. 391 pages. Fantasy

A beautiful discovery outside the window of her underwater home prompts the reclusive E. to begin a correspondence with renowned scholar Henerey Clel. The letters they share are filled with passion, at first for their mutual interests, and then, inevitably, for each other. Together, they uncover a mystery from the unknown depths, destined to transform the underwater world they both equally fear and love. But by no mere coincidence, a seaquake destroys E.'s home, and she and Henerey vanish. A year later, E.'s sister Sophy, and Henerey's brother Vyerin, are left to solve the mystery, piecing together the letters, sketches and field notes left behind--and learn what their siblings' disappearance might mean for life as they know it.

This book is gorgeous. The vivid cover is what first drew me in, and the lush, descriptive contents of this book did not disappoint. The format is epistolary, but rather than mere letters back and forth, the reader is invited to explore snippets of diary entries, field guides, published works from within the world, poems, drawings, and even unfinished drafts of words that shy, anxious E. wishes that she could say, but ultimately never sends. I completely fell in love with the gentle, proper, scholarly manner of every letter, reminiscent of Jane Austin style regency. The author completely leaned into the romance of sitting down and formally penning a missive for a far-away acquaintance, and this romance was displayed nowhere better than in the obvious growing affection between E. and Henerey. This, alongside a truly charming friendship between Sophy and Vyerin, all took place in a backdrop of breath-taking bioluminescence of the deep ocean abyss and cheerful colors dancing in coastal coral reefs. From tone to visuals to worldbuilding and more, Cathrall offers an unmissable tour of the mysteries and magic of the Luminous Deep.

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MD