Turtles All the Way Down is a young adult novel written by John Green. This novel is about a girl named Aza Holmes, and it describes her struggle with OCD or obsessive-compulsive disorder.

The setting of this novel is in modern day Indianapolis, Indiana. More specifically, this story takes place in multiple locations in this town such as White River High School, Davis Pickett's home, and the hospital.

Aza attends White River High School as a junior. It is at this location that Aza first learns from her friend Daisy that billionaire Russell Pickett has gone missing and there is a large reward for the person who finds the missing man. Aza knows Pickett's son, Davis, as she attended a summer camp with him.

Another setting for this story is Davis Pickett's home. Because his father is a billionaire, the Pickett home is quite impressive. Aza is stunned at first because of the difference between her home and the Pickett home, complete with movie theater.

A third setting for this story is the hospital. Aza ends up in the hospital after a car accident. Because of her OCD, Aza struggles being in the hospital and drinks hand sanitizer in an attempt to be clean, which is something she always obsesses over.

Other settings in this story include Aza's home and Applebee's.

John Green is a contemporary author of several young adult novels. His works are usually set around the time they are published and deal with issues facing his teenage audience. Like many of his other novels, John Green sets Turtles all the Way Down in modern day. Published in 2017, the work of fiction takes place in the 21st Century in Indianapolis, Indiana. The work's main character, Aza Holmes, lives in a suburb of the city.

Because the work is contemporary, audiences will be familiar with many of the restaurants, events, and references discussed in the text; for example, the characters discuss the White River, which is a real river that flows through downtown Indianapolis. However, because it is a work of fiction, many aspects of the book, like the name of the high school (White River High School) is made up.