- Travel and exploration: Brown wrote several books about his travels to various parts of the world, including *In the Land of the Rising Sun: Rambles in Japan* (1903), *Studies of Some European Cities* (1904), and *The Land of Temples: Adventures of a Travel-Lover in Siam* (1908).
- Literary criticism: Brown also wrote several books of literary criticism, including *The Poetry of Browning: A Critical Study* (1901) and *Studies in Victorian Literature* (1902).
- Biography: Brown wrote a number of biographies of famous people, including *The Life and Works of Robert Browning* (1902) and *The Life and Letters of William Hazlitt* (1907).
- Fiction: Brown also wrote several works of fiction, including the novels *The Secret of the Glen* (1900) and *The Man from the Past* (1901).
- Non-fiction: In addition to his other works, Brown also wrote several books on a variety of topics, including *The Elements of Success in Business* (1902), *The Art of Public Speaking* (1903), and *The Secrets of Success in Life* (1905).