Who among the following has authored the book "Spare"?

The book "Spare" is a memoir written by Prince Harry, the Duke of Sussex. Published in January 2023, the book provides a personal and candid account of his life within the British Royal Family. It covers significant events including the death of his mother, Diana, Princess of Wales, his military service in Afghanistan, and his eventual decision to step back from royal duties alongside his wife, Meghan Markle. The title "Spare" refers to the aristocratic adage of an "heir and a spare," highlighting his position in the line of succession relative to his older brother, Prince William. While the book was ghostwritten by J. R. Moehringer, Prince Harry is the credited author.