The phone book antique

The new BT phone book popped through the letterbox this afternoon. The phone book itself is quite analogous, even that sentence is. The traditional phone book would never pop through a letterbox, but would instead be left on the doorstep, and it used to be that even a Saturday mail delivery would be 10am at latest. Things change. And back to that phone book. I can't remember the last time I used one, for business or domestic landline numbers. With the demise of the Thomson Directory, I wonder if the BT phone book is long for this world. Mine isn't.