Reading the Protoevangelium (or, Infancy Gospel) of James

I don't know if there are any experts out there on the Protoevangelium (or, Infancy Gospel) of James, but if you exist would you share your wisdom with me regarding the following question:

(1) What's the best introduction for getting a basic understanding of what's going on in this text? 

(2) What's the best commentary on it?

(3) What's the best resource for understanding the textual history of this gospel?

(4) What are some important articles one should read?

Fwiw, full disclosure, my primary interest is how John the Baptist and his family are depicted, so if that helps you determine which articles, books, and/or chapters to recommend, great!