Missing Judy.

This is the book that I am reading recently. I haven’t quite finished it but I think it is really interesting so I decide to recommend it to everyone. Its genre can be assumed as mysterious, if there is that kind of genre. The book is about a girl named Kim Hockney. According to the story, she is a college student and is having a holiday. She goes home to visit her family. Throughout the first two or three chapters, she says that she has a sister who has been missing since she was 12 or younger. The structure is quite complicated, she keeps flashing back to the past and then back to the present. Sometimes I just have to question how old is she actually. In her flashback, she describes the day she lost her sister in lots of details. She explains how did she feel, describes what did her sister- Judy- wear, how did other people look at them, where did they go. Not in order thought.
After Judy’s missing , Kim and her parents tried everything to find her. They seem to be hopeless until some evidences turn up.
This is so far what I read.