I also sent a letter to Doubleday NZ asking them how they got my address when I'm not a client and why they thought it was OK to send me spam disguised as real mail. Interestingly, the contact through their website didn't work and I had to do a whois on the domain name to get an email address to send it to. The irony of this does not escape me. It will be interesting to see the reply, if I get one.
In the inimitable words of Powderfinger, my happiness is slowly creeping back. It feels good. Special backrubs help.