"Three Hours" is a novel written by Rosamund Lupton that explores themes of love, sacrifice, and the complexities of family relationships. The story unfolds in real-time over a three-hour period, focusing on a mother’s desperate search for her son during a school crisis. The narrative is gripping and emotional, highlighting the bond between parents and children. As the plot develops, readers are taken through a series of tense moments that reveal the characters' strengths and vulnerabilities, ultimately emphasizing the importance of connection and resilience in the face of adversity.