Some of his early novels , called `` scientific romances '' , invented several themes now classic in science fiction in such works as The Time Machine , The Island of Doctor Moreau , The Invisible Man , The War of the Worlds , When the Sleeper Wakes , and The First Men in the Moon .
He wrote books such as The Invisible Man , The Time Machine , The Island of Dr. Moreau , and The War of the Worlds .