The Worst Thing About My Sister is about two sisters who seemingly despise each other. Their names are Melissa (the older one) and Marty (the younger one) and they couldn\'t be more different. Marty is the tomboy who loves her Converse boots, helping her dad with putting up shelves, and hanging about in her Marty Den (her room). However, girly-girl Melissa loves sitting in her baby pink room. With their own rooms, Marty and Melissa can live with each other, but business with their dad\'s travel agency isn\'t going well, and their family are losing money rapidly. Then the girls\' mum has a visit from one of the girls in Marty\'s classes Mum, who would like Marty\'s mum to sew her daughter Alisha\'s party dress. To make money, Marty\'s mum agrees, so to be polite, Alisha\'s mum invites Marty to Alisha\'s party, taking place at a dancing school!!! Marty is outraged - for her, a dancing school party with Alisha is a nightmare, but when her mum tells her that she must wear a prissy, girly DRESS to the party, it turns into absolute torture! Marty extremely unwillingly is forced to go to the wretched party, and walks out of the dancing school with a new nickname - BLUEBOTTLE! Even at school the people who weren\'t even at the party call her it! When she gets home she has a surprise waiting for her - her mum wants to steal her Marty Den. The reason is that her mum has some requests from other mums to make dresses for their daughters, and poor Marty realises that she was the model for her mum\'s new dress making business!!! Melissa\'s room will need new decoration now that Marty\'s moving in, but grown up girly Melissa insists on having neon pink. Whilst sharing, Marty and Melissa have the usual fights, but one day Melissa seriously gets on Marty\'s nerves, and an everyday argument turns into a frightful reality, causing disaster for one of the girls... The Worst Thing About My Sister is told through Marty, so I would have liked to hear Melissa\'s point of view as well. This entertaining book is aimed for younger children because the writing is large, and the story is easy to follow. This book did not have many twists and turns in it, but the end was quite exciting! I would recommend this book to younger readers of about 8-9 years of age who like an exciting story creeping up to an amazing climax.