"A work of fathomless imagination" --SAMANTHA SHANNON, NYT bestselling author of  The Bone Season  and  The Priory of the Orange Tree   In the last days of the twenty-first century, sea creatures swim through the ruins of London. Trapped in the abyss, humankind wavers between fear and hope--fear of what lurks in the depths around them, and hope that they might one day find a way back to the surface.   When sixteen-year-old submersible racer Leyla McQueen is chosen to participate in the prestigious annual marathon, she sees an opportunity to save her father, who has been arrested on false charges. The Prime Minister promises the champion whatever their heart desires. But the race takes an unexpected turn, forcing Leyla to make an impossible choice.   Now she must brave unfathomable waters and defy a corrupt government determined to keep its secrets, all the while dealing with a guarded, hotheaded companion she never asked for in the first place. If Leyla fails to discover the truths at the heart of her world, or falls prey to her own fears, she risks capture--or worse. And her father will be lost to her forever.     "A thrilling post apocalyptic tale, vividly described and emotionally rich" PUBLISHERS WEEKLY   "A fast-paced masterpiece from start to finish" SCHOOL LIBRARY JOURNAL ​ "A spectacular debut" BARNES & NOBLE TEEN ​ "A thrilling journey packed with unexpected discoveries" KIRKUS REVIEWS   "A genre-blending stunner of a novel" BOOK RIOT ​ "One of the most unique debuts of 2019. Sparkles with skill." TOR.COM   "The best YA novel of the year" OPEN LETTERS REVIEW   "A thrilling narrative to get lost in. We've never read anything quite like it." PASTE MAGAZINE   "Science-fiction at its best" POP CULTURALIST "A work of fathomless imagination" --SAMANTHA SHANNON, NYT bestselling author of The Bone Season and The Priory of the Orange Tree "Expertly pairing catastrophe and courage, Shah tells the story of intensely personal problems in a truly perilous world. I love this book." --E. K. JOHNSTON, #1 NYT bestselling author of Star Wars: Queen's Shadow and more "A heart-racing adventure that reveals compelling and necessary truths about several critical issues of our times, while delivering all the thrills and twists of an epic quest. A stand-out, must-read book that engulfed me in its enthralling world and characters. Leyla McQueen is queen of the (under)seas!" --S. K. ALI, NYT bestselling author of The Proudest Blue and more "Shah's debut is a fast-paced masterpiece from start to finish. Readers will fall in love with passionate, persistent Leyla as well as her secretive, swoon-worthy companion, Ari. Shah has skillfully shaped a gorgeous world unlike any those fans [of dystopian fiction] have seen before. But be forewarned: the book ends on a jaw-dropping cliff-hanger. Highly recommended." --SCHOOL LIBRARY JOURNAL "A thrilling post apocalyptic tale, vividly described and emotionally rich." --PUBLISHERS WEEKLY "Still waters run deep with this novel. Shah is a remarkable worldbuilder. With her cast of intriguing characters, she deftly explores complex situations and ideas. This may be Shah's debut novel, but it sparkles with skill." --TOR.COM BOOK REVIEW "A thrilling journey packed with unexpected discoveries" --KIRKUS REVIEWS "One of the most unique debuts of 2019" --TOR.COM "This is a fine post-apocalyptic novel. There could easily be more stories in this undersea dystopian world." --BOOKLIST "A genre-blending stunner of a novel" --BOOK RIOT "Boasting a lushly-imagined dystopian world, Shah's novel delivers a thrilling narrative to get lost in. We've never read anything quite like it, and we can't wait for people to fall for this debut as hard as we have." --PASTE MAGAZINE "A spectacular debut, with some of the most inventive worldbuilding we've ever read." --BARNES & NOBLE TEEN "Science-fiction at its best--a strikingly crafted world, a tenacious heroine in Leyla McQueen, and an intensely engrossing story." --POP CULTURALIST "A remarkably assured vision of a world. The story Shah tells is so full of wisdom and adventure. The best YA novel of the year." --OPEN LETTERS REVIEW "A fascinating YA dystopian novel. This great book makes excellent use of its intriguing concept--very inventive, and a fantastic read." --CANBERRA WEEKLY "Delivers with waves of suspense and action. This fascinating page-turner is an action-packed adventure and a tender teen romance. A perfect novel for fans of high-octane dystopias." --VOYA REVIEWS " Waterworld meets The Hunger Games . The world-building is stunning." --YALSA, AMERICAN LIBRARY ASSOCIATION "Shah creates a timeless world all of her own, with insurmountable beauty, realism, and deep emotion. This is one of the year's most exciting reads." --THE INDEPENDENT VOICE NEWSPAPER, CA "Engrossing, compelling, and fantastically built. A book that r