"After traveling through time in Shadow of Night, the second book in Deborah Harkness's enchanting series, historian and witch Diana Bishop and vampire scientist Matthew Clairmont return to the present to face new crises and old enemies. At Matthew's ancestral home at Sept-Tours, they reunite with the cast of characters from A Discovery of Witches--with one significant exception. But the real threat to their future has yet to be revealed, and when...