Jmat's right. "The book" is "the telephone directory".
Did you not have the full text?
"If there's a God and He wants to talk to me, I am sure he knows my cell number. If He wants to call me on my land line, I'm in the book. Not the Book, but the phone book."
("The Book" with a capital B means the bible.)
http://voices.yahoo.com/the-solicitation-situation-8212941.html