The Christmas story is found in Matthew (1:18-2:18) and in Luke (1:26-56, 2:1-40). However, Isaiah should never be ignored:  
Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel.  (Is. 7:14)  
For to us a child is born,
to us a son is given;
and the government shall be upon his shoulder,
and his name shall be called
Wonderful [...]

“MISQUOTING JESUS: The Story Behind Who Changed the Bible and Why”, by Bart D. Ehrman, (San Francisco: HarperCollins Publishers, 2005, 242 pgs.)

Dr. Ehrman is a noted New Testament textual scholar.  His accomplishments are extensive, and he comes to the table with incredible abilities and extensive knowledge.  Yet, I was quite disappointed in Ehrman’s work.  [...]