Louis Chandler is an antique dealer and the owner of Chandler Interiors.
In 2000, Louis helps Rose Green renovate her new Victorian mansion in San Francisco. She also allows him to use the library to study the books in it. However, it turns out that he is behind all of the accidents in the renovation process, hoping to pressure Rose into selling the house so that he could find the Great Christmas Gold hidden in the house by Lizzie Applegate. Nancy stops him from doing this.
- Louis wrote a book called The Saboteur that can be found through Paseo del Mar's library search engine.