I thought I would track the impact of the Oprah announcement on the sales of the title specifically mentioned in the 'endorsement'. The Kindle version of The Story of Edgar Sawtelle is being offered at 10% off the regular price. The book was previously an Oprah pick in print form.
So just prior to the show airing on the east coast the Kindle version was ranked at 136 in the Kindle store. Now approximately 24hrs later it holds the 16th spot.
Here is a chart:
In isolation, it is hard to understand what it means in terms of units to move from 136th to 16th. It might be interesting to see what the respective print and kindle curves look like for future Oprah picks.
(I should have looked at the rank for the print version as well).