Look for the "Download" (Скачать) button on the book's main page.
If you are looking to download or read his stories, here are the primary platforms where his work is hosted: 📚 Where to Find His Books pavel dobrinetskii skachat knigi
MyBook: A subscription-based service where many of his completed works are available for streaming or offline reading. Look for the "Download" (Скачать) button on the