Board Thread:Show-Related Questions and Answers/@comment-1411567-20150401150107/@comment-25355646-20150401153723

I think the Sorcerer took over as Author or he enchanted the book with some of Gorin's DNA and cast an enchantment on the book so it wrote itself.

Also, think about this: every flashback we've seen contains some Author hidden in the background somewhere because the Author must witness these events.

For example: In 2x18, a picture is seen in the book of Baelfire from the scene in 1x08 where he and Rumple were making preparations to go the Duke's castle. So somewhere hidden in the grass or behind a curtained window was a past Author.