Has the author written anything else about these characters?

How to say “Has the author written anything else about these characters?” in Japanese

In Japanese

この著者(ちょしゃ)、この登場人物(とうじょうじんぶつ)が出(で)てくる話(はなし)をほかにも書(か)いてる？

Kono chosha, kono tōjō jinbutsu ga dete kuru hanashi o hoka ni mo kaiteru?

Has the author written anything else about these characters? in other languages