There is nothing wrong with marketing over the phone but unsolicited phone calls are not welcomed so I do not recommend using a phone book. I suggest using email, or online landing pages or squeeze pages, or your own website that allows you to collect contact information from prospects who really want you to call them so these squeeze pages or your own website/blog with a contact section so prospects themselves give you their email and phone number so you can contact them.
As you may know going into a phone book and calling people is considered making unsolicited phone calls because they are not asking for this information and in any business no one makes calls unless the customer fills out a request form.
So please don't use a phone book, create online applications instead to create a list of contacts.
There is nothing wrong with marketing over the phone but unsolicited phone calls are not welcomed so I do not recommend using a phone book. I suggest using email, or online landing pages or squeeze pages, or your own website that allows you to collect contact information from prospects who really want you to call them so these squeeze pages or your own website/blog with a contact section so prospects themselves give you their email and phone number so you can contact them.