A lot of people like Robert Jordan's Wheel of Time series. If she's into fantasy, there are, like, six or seven books out. Harry Turtledove also has a shitload of alternate history books out. One deals with the confederacy winning the Civil War. Another is a series about aliens invading during the middle of WWII. It all depends on her taste for sci-fi.
I'll tell her about Wheel of Time series, but she's a Historian and hates 'what if' books.
Old men, fear me! You will shatter under my ruthless apathetic assault!
Uschi - 2 Old Men - 0
"I am convinced that this world is of no importance, and that the only people who care about dates are imbeciles and Spanish teachers." -- Jean Arp, 1921
"If Jesus came back and saw what people are doing in his name, he would never never stop throwing up." - Max von Sydow, "Hannah and Her Sisters"