When Thomas Jefferson Dined Alone — Kristine Kathryn Rusch

When Living History Professor Kimber Lawson's least favorite student brings her a report of Mary Todd Lincoln conducting séances in the White House, Kimber brushes it off. But then more reports come to her attention -- of historical figures hearing voices, seeing ghosts and holding séances that had never before been reported -- she knows she must investigate. And what she finds might change everything she thought she knew about time travel.

Kristine Kathryn Rusch is one of the best writers in the field.
-- SFRevu