Gospels before the Book

What does it look like to read the texts we now call the gospels like first- and second-century readers? There is no evidence of anyone regarding the gospel as a book published by an author until the end of the second century. So, put differently, what does it mean to read the gospels "before the book"? For centuries, the ways people discuss the gospels have been shaped by later ideas that have more to do with the printing press and modern notions of the author than ancient writing and read...