Readers, please enjoy this guest blog post by Adam Selzer, author of Your Neighborhood Gives Me the Creeps, Ghosts of Chicago, and the new Ghosts of Lincoln. Abraham Lincoln stories are notoriously hard to verify; many of the famous stories about him weren't told until years after his death, and even a lot of first-hand accounts are pretty shaky. The same is true of ghost stories in general, so trying to find sources that related to both Lincoln AND ghosts was quite a challenge. But looking for evidence to back up a story that Lincoln once rode a flying piano at a séance is a pretty nifty way to spend one's working life. The story goes like this: according to a book published years