Lara Lington has always been a little weird. At least that is how her parents think. Lara is a proud Londoner and a new business owner. She started a headhunting business with her friend Natalie. She has recently broken up with her boyfriend, Josh, but she is determined to get him back. She does not believe that their love could have just ended like it did.Lara's great aunt Sadie Lancester has died at the age of 105. Lara never knew her great aunt, she had only met her once when she was a little kid. At the funeral Lara hears a voice of a girl asking for a necklace. She sees a girl in a weird clothes and starts to talk to her. What she notices quite soon is that no one else cannot see her. Lara is officially a freak- she is seeing a ghost. Sadie, the ghost, is asking Lara to find her necklace, she says she cannot rest in peace without it. Lara has no options, she has to stop the funeral and find the necklace.Sadie and Lara are like the day and night. Sadie is bubbly, easy going, a little crazy and looking for fun and Lara is more serious and thinks about things more logically. They have a lot of arguments and sometimes Lara feels like a fool talking to a ghost but eventually they become friends and they start to do things for each other; Sadie spies Josh for Lara and Lara goes to a date with Ed, an american guy, so Sadie would imagine herself at a date with him. Later on Lara starts to think that could Ed be something more than just a date for her great aunt's ghost. And in the middle of all this action Lara is trying to find Sadie's precious necklace.I had a lot of expectations towards this book since it was the first book I read by Sophie Kinsella. All those expectations were filled. Twenties Girl is such a funny book, I was laughing out loud when I read it. I love Lara and Sadie, they are so different but at the same time the same. I love how the story develops and how in the end Lara and Sadie become really close. This is definitely one of the funniest books I've read so far.