What happened to the Cat who swallowed a ball of Ya en E- 39?

In the story "The Cat Who Swallowed a Ball of Yarn" from the "Cat Who" series by Lilian Jackson Braun, the cat, Koko, swallows a ball of yarn, leading to a series of humorous and chaotic events. The yarn causes Koko to become entangled, resulting in a series of amusing mishaps as he navigates his surroundings. Ultimately, Koko's antics contribute to the unraveling of a mystery, showcasing his cleverness and the bond he shares with his owner, Jim Qwilleran. The yarn serves as a catalyst for both comedic moments and the progression of the plot.