Deborah Harkness’ A Discovery of Witches (Viking Adult, 2011) is a delightful and only somewhat-guilty pleasure. It’s like Twilight for smart, well-educated grown-ups. Here, a rich, urbane and ancient vampire falls for a thirty-something historian and budding witch. As their love and her powers grow, the book lags. But it ends with an exciting set-up for the sequel, Shadow of Night, the second in her planned All Souls trilogy. The book debuted July 10, and I can’t wait to read it. Unfortunately, I may have to wait awhile. The Las Vegas-Clark County Library only has 35 copies of the book, and 123 readers are in line ahead of me.