It’s weird; I found it using Googlebooks, but searching inside the book for “precariat” gives no hits. I managed to pull up in my browsing history the snippet view page whereby I found it. Naturally, being a snippet view, it doesn’t give much detail, but here’s what it shows (from p. 258)
working class: between a proleteriat, with unionized and rela-
tively secure jobs, and a “precariat” of casual workers, partici-
pants in the “underground” economy, which was a sort of late
twentieth century lumpenproleteriat.