It might be. True stories often get turned into books to raise awareness or share someone's harrowing experience. But one would need to research the background and author's claims to confirm its authenticity.
Another theme is the impact on family. The families of the kidnapped girls often go through a great deal of pain and turmoil. In books like these, we see how they search for their loved one, deal with the uncertainty, and how their lives are forever changed. In 'The Lovely Bones', the family of the girl is shattered by her disappearance and murder.
One such book is 'Room' by Emma Donoghue. It tells the story of a young woman who was kidnapped and held captive in a small room, and the life she builds there with her young son who was born as a result of her captor's abuse. It's a harrowing but ultimately hopeful story.
Another book could be 'The Kidnapping of Edgardo Mortara' by David I. Kertzer. Although it's not exactly about a girl, it's a true story of a young boy being kidnapped under religious pretexts in the 19th century. It shows the power dynamics and the inhumane actions that can occur during such events and can be related to the broader topic of kidnappings.
There was a girl, Sarah. She was kidnapped by a group of thieves. They gagged her to keep her from shouting for help. Sarah was put in a dark room. She was so scared but she didn't lose hope. She noticed a sharp object on the floor. Using her feet, she managed to get it and cut the ropes around her wrists. After that, she removed the gag and started looking for a way out. She found a small opening and squeezed through it. Finally, she found her way back home and told her parents who called the police.