Karen Edmisten posted a nice review of When’s God Gonna Call Me Back? on her blog. You’ll enjoy Karen’s blog in general, so I hope you check back with her often.
Some folks mistakenly think that this feast refers to our Lord - that he was immaculately conceived, without stain of sin. Well, that's true, but that's what the Annunciation is all about, not the Immaculate Conception. The Solemnity of the Immaculate Conception refers to the conception of the Blessed Virgin Mary, who was conceived without original sin.