A serviceable cultural history of Americans' abiding conflation of spiritual redemption and material acquisition, of which Oprah is the modern-day avatar. Lofton's evidence suggests that what both Oprah and the earlier preachers and writers in the same vein had in common was not theology or religious practice; rather, it was that all of them represent separate reactions to the abiding pecuniary incentives created by Americans' abiding demand for a gospel of success.
Yes, cultural history; but what this book is not, however, is an intellectual history of Oprah (whatever that could possibly mean), and where it attempts to be that, it fails. For example, the connection Lofton makes between Oprah with Finney is not an intellectual one -- that is, there is no dialog between them, no indication that Oprah sees herself as appropriating, critiquing, reworking, or even aware of the existence of Finney. Whatever continuity theres is between these two is not a matter of intellectual heritage, but of popular culture across centuries of American religious-material practice. Likewise, when Lofton does try to place Oprah in an intellectual tradition (of the New Thought), the effort is strained: she notes how Oprah's book "references" earlier scholarship, but (perhaps wisely) avoids engaging in a close textual analysis of that "referencing," to see whether the intellectual engagement was profound, or simply garnish on top of an essentially commercially motivated product.