Modern Mariology
Our Lady of Guadalupe by Father Lovasik.
Contemporary Mariology
The earliest account of the apparition, the Nican Mopohua, Here It Is Told, is translated into English here. Or in this book, which you may borrow for free. You may read here about what may be its earliest manuscript, at the New York Public Library (here is its catalogue entry).
Anthology of Early Guadalupan Literature (free to borrow with registration).
Art
Guide to Christian Iconography: Images, Symbols, and Texts
Virgin of Guadalupe and Saint Juan Nepomuceno
Music
An entire album of traditional songs for Our Lady of Guadalupe.
Nihil sub sole novum 
