Library.

“In Iain Reid's novel "I'm Thinking of Ending Things," the final section set at Jake's old high school is shorter, more claustrophobic, and more direct than the corresponding final section in Charlie Kaufman's film adaptation "I'm Thinking of Ending Things."”

Available criticism and plot analysis support the comparison. The novel’s high-school ending is generally described as a brief, enclosed, explicit climax, while the film extends that material into a longer, more surreal and indirect finale with added stylized sequences. The remaining caveat is that terms like “claustrophobic” are interpretive, not strictly measurable.

“In Iain Reid's novel "I'm Thinking of Ending Things," the story is told entirely through one woman's anxious first-person narration.”

The novel is predominantly presented through an unnamed woman’s anxious first-person narration, which is the book’s defining narrative experience. However, the claim overstates this with “entirely,” because credible commentary indicates the novel briefly leaves that perspective at the end. The core description is right, but the absolute wording is not.