All 4 books of Sabaa Tahir's An Ember in the Ashes series — a dual-POV fantasy inspired by ancient Rome.
Inspired by ancient Rome, Sabaa Tahir's series follows two alternating POVs: Laia, a Scholar girl who goes undercover as a slave to rescue her captured brother, and Elias, an elite Mask soldier who wants to escape the military empire he was raised to serve. The dual-narrative structure is one of the series' great strengths — both characters are morally complicated and their arcs intersect in ways that keep escalating across four books.
Start with An Ember in the Ashes (2015) — the first book is complete enough to read standalone if you want to test the series before committing.
Laia's brother is arrested by the empire. To save him, she must spy inside the most dangerous military academy in the land. Elias, the academy's best student, is planning his escape from a life he didn't choose. Their paths collide.
Laia and Elias are fugitives, pursued across the empire. They must reach a prison before Laia's brother is executed. A third POV is introduced — Helene, Elias's closest friend, now tasked with hunting them down.
War is coming to the empire from multiple directions. Laia, Elias, and Helene each fight on separate fronts while a supernatural threat escalates. The darkest volume of the series.
The final book. Every plotline from across the series converges as Laia, Elias, and Helene face a supernatural war that will determine the fate of the empire and everyone in it.
Yes — it's published as YA, but it's notably darker and more violent than most YA fantasy. The themes of slavery, oppression, and survival are handled seriously. Older teen readers and adults who enjoy YA with more weight will find it works well. Many adult fantasy readers recommend it without qualification.
The first book is the tightest and most praised. Books 2 and 3 expand the world significantly and introduce Helene as a major POV, which many readers consider an improvement. Book 4 is more divisive — the supernatural elements become more prominent and the scope is very large. Overall it's considered one of the stronger YA fantasy series of the 2010s.
Four books, published between 2015 and 2020. Each book is roughly 400–500 pages. The series is complete.