Answer:
If you are asking for academic purposes: it is the first book in a series of 3, in which the main character and narrator, Katniss Everdeen, volunteers to take her younger sister's place in the Hunger Games. She faces extreme trauma and makes new friends and new enemies along the way.
If you are asking for personal reasons: IT'S AWESOME BRO, 10/10 recommend. Loved it. You need to be able to handle gore and a certain extend of psychological horror tho (it's not too bad, I thought it was fine even though I am sensitive to such content).