Claudia's best friend, Monday, is missing, but she can't get anyone to believe her. Monday's mother claims Monday is with her father, while Monday's sister says she's with her aunt. Monday hasn't shown up to school, but the school hasn't checked on her. And Claudia's parents don't want her worrying about it. Claudia knows something is wrong. But how can she get anyone else to believe her?
This book was frustrating to read at times simply because there were so many adults turning a blind eye to an obvious problem. Seeing Claudia try again and again to ask for help only to find none got painful. Especially since the book told you from the start how long it will take for Monday to be found, so you knew all of Claudia's early attempts were doomed to fail because it's too soon.
The biggest issue I had with the book was the timeline. The book had several different timelines that it jumped between. The timelines included the expected Before and After, but what made it confusing were the One Year Before the Before and Two Years Before the Before timelines. It was hard to keep them all straight early on. It all eventually made sense, but that didn't make easy before that point and that confusion detracted from the story.
What did shine through in the book were the emotions Claudia felt over Monday's disappearance. Claudia's pain was apparent throughout the entire novel, and the timelines set before Monday's disappearance established their relationship well. Monday meant a lot to Claudia and her disappearance caused big changes in Claudia's life beyond just not having her best friend that Claudia simultaneously was dealing with as she also tried to find her friend. Basically Claudia was a mess during the book for a number of reasons and that came across very well.
Monday's Not Coming was well-written and packed an emotional punch, but the structure with the multiple timelines took some of that punch away by adding confusion to a narrative that didn't benefit from it. Despite that, it was an overall enjoyable, although painful, read.