1) Old books are cool by definition! Because they are, well...old...and they are books!
2) It's an influential book of the Civil War era and a part of the "canon" of the 19th-century Spiritualist movement, both of which are interests of mine.
3) It was published by the publishing house of Fields & Osgood, the firm featured in one of my favorite books, The Last Dickens (see my recent interview with author Matthew Pearl here)
4) And finally, unbeknownst to me until I received it, it has a wonderful Christmas 1869 inscription! Apparently it was a gift from a pupil "Johnny" to his teacher, "Miss Beach." Tantalizing! I love it!