Sister by Rosamund Lupton
The style in which this story is told is really interesting. The whole tale is told as a letter: a letter from a sister to her dead sister explaining, as the living sister uncovers the truth, why the dead sister was murdered. The police all think Tess committed suicide, but Bee knows her sister. She knows her sister would never take her own life, not after what they both went through.
I could say more, but I won’t. I want to make sure you’re able to have the story uncovered little by little as I did. I have to admit I did figure out the motive for the murder before Bee, but not the perpetrator, and definitely not the zinger you get at the end.
