In the days when people still had telephones a phone number was crucial for any social engagement.
Now you can Google anything you like and it's pretty easy to track down someone’s email address, Skype, linked in, IM, Facebook, twitter etc. etc.
Doesn't mean they are the right man or woman for the job.
That's why all the best names and addresses are closely guarded secrets.
Denizen Magazine have just published their own version of the black book, we are pleased to be in it.