This book is written in first person plural (the three sisters in the title narrate and the viewpoint flows back and forth), so it was a little confusing at first as to who was telling the story. By the second chapter I grew accustomed and I ended up really enjoying the plural viewpoint (I don't remember ever reading another book written this way). 
 The Weird Sisters of the title are the 3 daughters of a Shakespearean professor, named after heroines in the plays. They all return home for various reasons and because their mother has breast cancer. The entire family reads all the time. It's a fairly typical growing up story, but the author writes beautifully, raising it above the average.