Answer by taking a quote from the following article:

Craig Ferguson (born 17 May 1962) is a Scottish-American television host, comedian, author and actor. He was the host of both the syndicated game show Celebrity Name Game (2014-2017), for which he has won two Daytime Emmy Awards, and of Join or Die with Craig Ferguson (2016) on History. He was also the host of the CBS late-night talk show The Late Late Show with Craig Ferguson (2005-2014). In 2017 he released a show with his wife Megan, titled Couple Thinkers.

Ferguson's novel Between the Bridge and the River was published on 10 April 2006. He appeared at the Los Angeles Festival of Books, as well as other author literary events. "This book could scare them", he said. "The sex, the violence, the dream sequences and the iconoclasm. I think a lot of people are uncomfortable with that. I understand that. It was very uncomfortable to write some of it." The novel is dedicated to his elder son, Milo, and to his grandfather, Adam. He revealed in an interview that he is writing a sequel to the book, to be titled The Sphynx of the Mississippi. He also stated in a 2006 interview with David Letterman that he intends the book to be the first in a trilogy. Ferguson signed a deal with HarperCollins to publish his memoirs. The book, entitled American on Purpose: The Improbable Adventures of an Unlikely Patriot, focuses on "how and why [he] became an American" and covers his years as a punk rocker, dancer, bouncer and construction worker as well as the rise of his career in Hollywood as an actor and comic. It went on sale 22 September 2009 in the United States. On 1 December 2010 the audiobook version was nominated for a Best Spoken Word Album Grammy. In July 2009, Jackie Collins was a guest on The Late Late Show to promote her new book Married Lovers. Collins said that a character in her book, Don Verona, was based on Ferguson because she was such a fan of him and his show.

What was The river about?
The sex, the violence, the dream sequences and the iconoclasm.