Reddit reviews Reframing Latin America: A Cultural Theory Reading of the Nineteenth and Twentieth Centuries

If you're interested in further reading, I'd recommend John Charles Chasteen's Born in Blood and Fire. It's a good survey of the last five hundred years of Latin American from a social history perspective. It's been a few years since I've read it, so I don't remember how much detail it goes into concerning the construction of Mexican identity through the idea of mestizaje, but it's nevertheless an interesting read.

Also of note is Reframing Latin America, which examines nineteenth and twentieth century constructions of race, class, gender, nation, and Latin America as a whole through a lens of cultural theory that's heavy on semiotics and hermeneutics. It's pretty dense stuff, but fascinating nevertheless.