Gospel of Judas - To write a book when one is in a hurry... any logic there eh?

How could Judas Iscariot write a book (Gospel of Judas) when he was in a hurry of returning 30 silver coins with remorse (Matthew 27:3-4) and hanging himself (Matthew 27:5)? Any logic there eh? Possible another fiction like “The Da Vinci code” using real characters to fabricate a story, like stories of Chinese legends: "Jin Yong" chivalric fiction novel - partial history and partial fiction.

Probably a piece of Gnostics writing: "Gospel of Judas" written by an organization - Cainite Gnostics.

Also, beware of the last few verses of the last book of the Bible:

"I warn everyone who hears the words of the prophecy of this book: If anyone adds anything to them, God will add to him the plagues described in this book. And if anyone takes words away from this book of prophecy, God will take away from him his share in the tree of life and in the holy city, which are described
in this book." (Revelation 22:18-19)