The Bible attributes several books to a John, but it's important to be specific:
* The Gospel of John: Tradition attributes this gospel to John the Apostle, one of Jesus's twelve disciples. However, some scholars debate the actual authorship, suggesting it might have been written by a follower or member of the Johannine community.
* The Epistles of John (1 John, 2 John, 3 John): These letters are also traditionally attributed to John the Apostle. Many scholars believe they share a similar style and theological themes with the Gospel of John, suggesting a common author or at least a shared tradition.
* The Book of Revelation: This book identifies its author as "John," but there's much debate whether this is the same John as the author of the Gospel and Epistles. Some scholars argue for the same author, while others believe it was a different John, possibly a prophet or elder in the early church.
So, to answer your question, there's no single "John the author of the Bible." Instead, there are multiple books attributed to a John, and the identity of that John is debated for some of those books.