Don't you need to look up anyone else's number? Not having a landline phone yourself doesn't mean you don't need the book.
Its funny, but you would think that.
But All listed numbers can be found on the internet.
I actually cannot remember the last time I actually picked up a phone book, either white or yellow. If I want to look something up, I'll just connect to the net and get the info.
Haven't had a land line in Utah for about 15 years. Haven't bothered with a phone book of any kind for about 5. At my place in the Dakotas it is different, most businesses don't have much of an Internet presence, and cell coverage at the farm house is both marginal and intermittent, so I have and use both.