Former research scientist in medical diagnostics, Linda Zimmerman started researching paranormal phenomena in the Hudson Valley of New York in the 1090s. She is the author of several books on American history, humor, science, and science fiction. A series of lectures on local lore and legend led her to write "Ghosts of Rockland County." Due to the popularity of that book, Ms. Zimmermann wrote "Haunted Hudson Valley." She frequently lectures in the tri-state area and has written additional ghost books.