Upton Sinclair's book The Jungle provides a concrete example, useful for grounding a discussion of the "Death of the Author". Stealing a paragraph from Wikipedia

In The Jungle (1906), Sinclair gave a scathing indictment of unregulated capitalism as exemplified in the meatpacking industry. His descriptions of both the unsanitary conditions and the inhumane conditions experienced by the workers shocked and galvanized readers. Sinclair had intended it as an attack upon capitalist enterprise, but readers reacted viscerally. Domestic and foreign purchases of American meat fell by half. Sinclair lamented: "I aimed at the public's heart, and by accident I hit it in the stomach." The novel was so influential that it spurred government regulation of the industry, as well as the passage of the Meat Inspection Act and the Pure Food and Drug Act.

Author's really do intend specific interpretations, and can notice, with disappointment, when readers impose a different interpretation by weight of numbers.