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From our friends over at Abe Books:

We all know that President Obama loves to read books. According to the White House, during his vacation to Martha's Vineyard the president has been working through four novels and one work of non-fiction. We thought we'd share: Obama's 2011 summer reading list.
The Warmth of Other Suns by Isabel Wilkerson
Cutting for Stone by Abraham Verghese
Rodin's Debutante by Ward Just
To the End of the Land by David Grossman
The Bayou Trilogy by Daniel Woodrell