The audio begins with the distinct, sharp sound of books striking against a solid surface, creating a thudding noise that resembles a rhythmic knock. The noises are forceful and loud, akin to an insistent bang on a door. The unique fluttering sound of pages rustling accompanies each impact, clearly identifying the items as books. The sounds are repeated, creating a pattern as if the books themselves are attempting to gain entry. Each book makes a slightly different sound based on its size, weight, and the number of pages it contains. The audio encapsulates the quirky yet intriguing scenario of books knocking on a door, combining the ordinary with the extraordinary.