"Mockingjay" is the third and final book in the "Hunger Games" trilogy written by Suzanne Collins. Published in 2010, it concludes the story of Katniss Everdeen and the rebellion against the oppressive Capitol in the dystopian nation of Panem.

In "Mockingjay," Panem is in the midst of a full-scale revolution. Districts rise up against the Capitol, inspired by Katniss's defiant acts in the previous Hunger Games. Katniss reluctantly becomes the symbol of the rebellion, known as the Mockingjay, and is tasked with uniting the districts and leading the fight against President Snow and the Capitol's forces.

As the war intensifies, Katniss witnesses the horrors of battle, experiences loss and betrayal, and grapples with her role as a symbol and a pawn in the larger conflict. She must navigate complex alliances, make difficult choices, and confront the true nature of power and rebellion.

"Mockingjay" explores themes of war, propaganda, the consequences of violence, and the price of freedom. It delves into the moral gray areas of war and rebellion, blurring the lines between heroes and villains. The story also delves into the personal struggles and emotional toll that the characters face in a world torn apart by conflict.

With its gripping narrative and intense emotional stakes, "Mockingjay" brings the "Hunger Games" trilogy to a dramatic and thought-provoking conclusion. It examines the cost of standing up against oppression and the power of hope and resilience in the face of adversity.

Please note that this description focuses on the general plot of "Mockingjay" and does not contain specific spoilers for the book or subsequent adaptations.