The Boys of '98

First published in 1898, historical novel for boys, set during the Spanish American War. According to Wikipedia: "James Otis Kaler (March 19, 1848 — December 11, 1912) was an American journalist and author of children's literature. He used the pen name James Otis... In 1880, under the pen name James Otis, he authored his first children's book, Toby Tyler, or Ten Weeks with a Circus, a story about an orphan who runs away to join the circus. Following the book's success he went on to author numerous other children's books."