Threats and Bookcases

Readers, I must be brief. I have received an anonymous letter from some fiend lurking in Burlingston. I have attached a picture here:

I found my beautiful wife, Callista Manley, under a set of bookshelves in my office today with this note in her hands. I think she is fine physically, but I fear that her mental state is quite fragile. I must take her to the hospital to be completely sure.

More to come.