James Potter and the Hall of Elders Crossing

James Potter and the Hall of Elders' Crossing is a 360 page web-based novel written by American computer animator George Norman Lippert. It is an unofficial continuation of J.K. Rowling's highly successful Harry Potter book series. Written as a fan fiction project for Lippert's wife and sons, the novel is set eighteen years after the end of the last official installment in the series, Harry Potter and the Deathly Hallows, and describes the adventures of Harry Potter's son, James Potter II, during his first year at Hogwarts School of Witchcraft and Wizardry.
This is a fanfiction that continues J.K. Rowling's adventure of Harry Potter and his son, James Potter.

While this is a fan fiction, I first heard about this on the news as it was getting quite a lot of attention. Rowling was trying to sue over it, saying that it was copyright infringement.