The novel The Fault in Our Stars, written by John Green, depicts a teenage girl, Hazel Grace Lancaster, who is struggling with a rare form of cancer in her lungs. She tries to be a normal girl who goes to treatments, goes to college, and to a support group for teens with cancer. It's at one of these support group meetings that she meets Augustus Waters, a teen who has lost half of one of his legs due to cancer. He is at the support group to help his friend, Isaac, who is about to lose his eyesight completely to cancer. Augustus and Hazel Grace become closer and closer and find time to have a normal friendship between all the treatments and support groups. Hazel Grace's feelings for Augustus grows, as do his, however hazel refuses to be in a relationship because she fears she will die and doesn't want to hurt him. .
Their relationship grows over a shared interest in a book titled, An Imperial Affliction, written by an author named Van Houten. They email this author and then take a trip to Amsterdam to ask him some questions about the book that they have. However, when they arrive the discover Van Houten is a heartless drunk, who is uninterested in answering any of their questions. Before they head back to the states, Augustus shares with Hazel that his cancer has come back, and is very aggressive. After they return from their trip, Augustus' condition worsens, and eventually he passes away. .
Hazel Grace Lancaster, one of the main characters of the novel, is a strong-willed young teenager living with Stage 4 Thyroid Cancer, living with it by taking an experimental drug called Phalanxifor. She has already got her GED and attends college courses at her local community college. Augustus Waters, another one of the main characters, is a teenager who overcame his battle with Osteosarcoma, which has caused him to lose the lower half of one of his legs. Augustus is doing better for some time, until eventually, the cancer seemingly takes over his body and he is made of the cancer.