"A Sky Beyond the Storm" is a novel by Sabaa Tahir, published in December 2020. It is the fourth and final installment in the "An Ember in the Ashes" series, which is a popular young adult fantasy series. The series as a whole has gained a significant following and received positive reviews for its complex characters, intricate world-building, and compelling plot.

The story is set in a fictional, dystopian world inspired by ancient Rome, where an oppressive empire called the Martial Empire rules with an iron fist. The series follows the lives of various characters, including Laia, Elias, and Helene, as they navigate a world filled with magic, political intrigue, and a brutal regime.

"A Sky Beyond the Storm" continues the saga as it builds toward an epic conclusion. It delves into the characters' personal struggles, the ongoing battle for freedom and justice, and the complex relationships between the characters. Throughout the series, themes of love, sacrifice, resilience, and the fight against oppression are explored in depth.

It's worth noting that "An Ember in the Ashes" series has been praised for its exploration of important social and ethical themes, making it a thought-provoking read for young adults and adults alike. As with many books that address such themes, it has also faced challenges and objections from some quarters.