It depends on the meaning. Invoking usually means that you simply call that entity to you. Channeling is where a person allows the entity to use their voice to give messages. 

Is there a local library that you can use? Most libraries have computers that you can book. 

Paranormal State use to be good, but now it has turned in to a show of demon hunters. They believe that every haunting is of Satan and the demons. They blamed one girl for her house becoming haunted because she was reading the Satanic Bible by Lavey. They proceeded to make her be baptized by a...