The Last Battle by C.S. Lewis

I found this one harder to get into because the first six words give you a sense of doom for the entire story, however things of course do turn out all right in the end in a very convoluted way. As a separate book it is quite a strange thing, but if you think of it simply as the conclusion to the series it makes much more sense because it lacks its own story arc to carry you through. The religious elements are much more heavy handed in this book, but it honestly would not make sense without them. I definitely would not read it by itself but as closure for the entire series it is necessary.
(This is the seventh book of The Chronicles of Narnia.)

The Silver Chair by C.S. Lewis

Eustace returns accompanied by his classmate Jill as they flee the school bullies. Once again years have passed in the land of Narnia and Aslan has a mission for the Son of Adam and the Daughter of Eve. They set out to rescue the prince from the terrible sorceress, but the story is more about the struggles of the journey than their victory. More than in any of the other books this one reminds you that things are not always as they seem. Ironically though I had forgotten many things from these books in the years since I last read them one image has stuck with me: Rillian, Jill and Eustace chasing down the school bullies blades drawn. This is another win for the underdogs.
(This is the sixth book of The Chronicles of Narnia.)

The Voyage of the Dawn Treader by C.S. Lewis

The story line in this book is in some ways more light hearted as instead of coming to save the day the children come to join in on an adventure. But the adventures (which bear a similarity to Homer’s Odyssey) actually give the opportunity for an even greater number of lessons to be taught. Peter and Susan could not come along this time and in their place is cousin Eustace who learns many of the lessons first hand. This one cemented Lucy as my favorite, so I find it hard to imagine what the last two will be like without her.
(This is the fifth book of The Chronicles of Narnia.)

Prince Caspian by C.S. Lewis

The Pevensies reenter Narnia in a very different way and arrive to find the world that they love drastically changed. Instead of winter, men have taken over Narnia and the true inhabitants have been forced to hide in dark corners. There is one named Caspian who was heir to the throne but it was stolen and thus with Aslan and the Kings and Queens of ages past to guide them the Narnians take back their country. Even though the children grew to adulthood in Narnia once before there is something about their growth in the outside world that changes their connection to Narnia forever.
(This is the fourth book of The Chronicles of Narnia.)

The Horse and His Boy by C.S. Lewis

Definitely not as well known as others in the series, but it definitely ranks as a personal favorite. Set during the time when Peter is High King it only briefly overlaps with the lives of the Pevensies because the four that make up this strange party are all in Calormen when their tale begins. We begin our tale with Shasta a northerner exploited by the man who saved his young life, but when joined by a captive Narnian talking horse an escape plan quickly forms. Aslan guides the odd pair as they pick up others along the way and in the end home is something much more than a place to sleep at night.
(This is the third book of The Chronicles of Narnia.)

The Lion, the Witch and the Wardrobe by C.S. Lewis

By far the most famous of the series, it introduces us to the famous Pevensie children. They enter Narnia by a more direct route than Digory but the magic is the same. They arrive in Narnia in a time of need as Jadis, now known as the White Witch, has claimed rulership of Narnia and oppresses the inhabitants in an eternal winter. However evil beware because Aslan returns. One thing I love about Lewis’s style in these books is the occassional acceptances of it being a book as if the stories were gleaned from interviews. It lends the tales both an extra sense of legend and reality.
(This is the second book of The Chronicles of Narnia.)