The author of 'The Invisible Man' is H.G. Wells, a five-letter answer to the crossword puzzle. H.G. Wells was an English writer who wrote science fiction novels, short stories, and non-fiction works. He is best known for his novel 'The War of the Worlds' and 'The Time Machine'. 'The Invisible Man' was published in 1897 and is considered one of the most influential science fiction novels of all time.