It's not clear whether the president is doing most of his reading in hard cover (or paperback) or has switched primarily to e-readers. He and the first family stopped making their summer trip to the Bunch of Grapes bookstore in 2013.
Here's the list as provided by the White House:
"All That Is," James Salter
"All The Light We Cannot See," Anthony Doerr
"The Sixth Extinction," Elizabeth Kolbert
"The Lowland," Jhumpa Lahiri
"Between the World and Me," Ta-Nehisi Coates
"Washington: A Life," Ron Chernow