I have read the Chronicles of Narnia before, but it was a couple years ago and of course I remember little about the books other than the famous The Lion, the Witch, and the Wardrobe. I have since reread The Magician's Nephew, which is chronilogically the first book of the series, although not the first book written.
These books are all FANTASTIC! They are so full of excitement, humor, romance, courage, values, and above all Jesus =)
Also I highly highly recommend the movies too. They are really well done and have such a good message in each of them.