James Otis 
The Search for the Silver City: A Tale of Adventure in Yucatan [EPUB ebook] 

In 1880, under the pen name James Otis, he authored his first, and still most famous (largely by way of a filmed version by Walt Disney), 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, mostly historical and adventure novels.