Do Private Investigators Use A Reverse Phone Book?

Don and Jake have been looking into opening a private investigating company.  Don use to work for the government and he is retired. Jake has been working as an security guard for a large office building down town.  Don knows a lot about private investigation and is going to train Jake.  He has given Jake an assignment and told him to do a search for reverse phone book residential.  Once Jake has found the information and a few web sites he is going to do a search on himself to see what information can be found.  Once he has completed this, Don will give him a real assignment.