Have you read Connie Willis' "The Doomsday Book"? That is totally unputdownable.
A history student in the 22nd Century uses the new technology of timetravel to research the period she is studying. There is a slight time malfunction and the girl ends up 30 years or so later than planned - 1347, the year of the Black Death. Due to the malfunction, her people back in the 21st century cannot bring her back.
She, of course, knows what is going to happen, and knows that she cannot catch the plague(she has been innoculated against just about everything before she left her own time).
It is very well written, and will remain with the reader long after the back cover is closed.