To get us in the Christmas mood, here are three carols in code. The first to tell me who they are will be the December 2018 JCC Champion.
Whoever you are, my very best wishes for a wonderful Christmas season and joyful New Year x

Caesar Cipher:    KP  VJG  DNGCM  OKFYKPVGT

Book Cipher:       3  1  74  68  58  6        78  48  36  4  8

Pairing Cipher:    SZIP  GSV  SVIZOW  ZMTVOH  HRMT