Some of them seem to be about business management, but one is about calculus, and there are others about art and history, and one narrow volume looks like a collection of poetry.
Obama had repeatedly drawn a "red line" on the use of chemical weapons by the Syrian regime, warning President Bashar al-Assad that using or moving chemical stockpiles was the one thing that would " change my calculus" on that war.
When Kerry started to talk about changing al-Assad's calculus, the State Department reintroduced the proposals and the White House "is opening up a bit, " one of the administration officials said.