"Being or Nothingness" by "Joe K"

2009/11/06: I got another one!

2008/08/22: Hofstadter confirms

On August 20, 2008, I received a mysterious package in the mail from Sweden. I do not know who sent it; it has no return address and I don't know anybody from Sweden. Below are some photographs of the envelope and its contents (a book entitled "Being or Nothingness").

• The envelope
• Inscription in place of return address
• Swedish postmarks and stamps
• The only contents were this book
• The book carries this warning label
• The spine shows no publisher
• The rear cover
• Opening the book
• The letter to Professor Hofstadter is attached inside
• The title plate
• Page 1 (title card)
• Page 2 (Preface)
• Page 3 (Prelude)
• Page 4 (Prelude)
• Page 5 (title card again)
• Page 6 (Dedication)
• Page 7 (Motto)
• Page 8 (Axiom)
• Page 9 (Food for thought)
• Page 10 (Food for thought)
• Page 11 (Food for thought)
• Page 12 (A dream)
• Page 13 (The first day)
  • an interesting "typographical" detail
• Page 14 (The second day)
• Page 15 (The third day)
• Page 16 (The fourth day)
• Page 17 (The fifth day)
• Page 18 (The sixth day)
• Page 19 (The seventh day)
• Page 20 (The seventh day)
• Page 21 (Afterword)
• Blank page
• Another blank page
• Inside rear cover

Update: On August 22, I wrote Dr. Hofstadter to see if he had actually been mailed this book too, and he told me that, in fact, he had...so the question remains, why is it now being sent to me?

If you have any idea what this is all about, or even small observations (one friend noted that the nom de plume "Joe K" is an anagram for "Joke", which I hadn't noticed), please leave a comment.