Meghan to publish children's book based on husband Harry and son Archie

Meghan and Harry have rarely been out of the media spotlight since they gave an explosive interview to Oprah Winfrey. [Courtesy]

Meghan, Britain's Duchess of Sussex, is to publish a children's book next month titled "The Bench" about the relationship between a father and son based on her husband Prince Harry and the couple's child Archie, the publisher said on Tuesday.

The book is the latest venture by Meghan and Harry, Queen Elizabeth's grandson, since they stepped down from royal duties and moved to Los Angeles last year with Archie, who celebrates his second birthday later this week.