Review of A Discovery of Witches & Shadow of Night

These two novels by Deborah Harkness are for adults, but a teen who likes a challenge would enjoy both of them.  The first book starts out a bit slow, but soon you're engrossed in a world of witches, vampires, daemons and alchemy.  The historical references are fun to follow and the love story compelling.  Shadow of Night takes us into the past, with a great feeling for living in earlier times surrounded by famous characters from history (many turn out to be daemons or vampires).  I'm really looking forward to the third and final book in this series.