MLK Jr.'s son, Martin Luther King III, and his wife, Arndrea Waters King, co-authored the book "What is My Legacy?" with activists and contributors, including Julia Roberts.

Every year we honor the legacy of Martin Luther King Jr. in January. Here's everything you need to know about the holiday.

Is the stock market open on Martin Luther King Day? The answer to this question is no. The stock market will be closed Monday, January 20, for MLK Day, as the holiday is also known. Martin Luther ...