THIS MIGHT SURPRISE YOU
The answer
After Revelation, Sinaiticus binds in the Epistle of Barnabas and the Shepherd of Hermas — two widely read early Christian works that later canon lists left out. Whoever produced this fourth-century Bible bound them in with scripture, whatever status they meant that to signal.
Why it’s interesting
It's a physical snapshot of a canon still settling: in the fourth century a book could be bound into a Bible and still fall outside the lists. Eusebius, writing in the same era, placed both among the books the churches set aside.
Scholarly consensus
You can know the Bible.
Not just the stories, but the history, authorship, and scholarship behind it.