Christopher Morley 
The Haunted Bookshop [EPUB ebook] 

The Haunted Bookshop is a 1919 novel by Christopher Morley. This is a suspenseful novel set in Brooklyn around the time of the end of World War I. It continues the story of Roger Mifflin, the book seller in Parnassus on Wheels. It also details an adventure of Miss Titania Chapman and a young advertising man named Aubrey Gilbert.
The name of the book refers to the ghosts of the past that haunt all libraries and bookstores: 'the ghosts of all great literature.’ Throughout the novel Morley, through the character of Roger Mifflin, makes reference to the knowledge and wisdom that one can gain from literature.