The Voyage Of The Dawn Treader by C.S. Lewis

In this, the fifth book of The Chronicles Of Narnia, Lucy and Edmund have returned to Narnia without Susan and Peter, who are now too old.  Their cousin, Eustace, considered obnoxious by everyone except his parents, is brought along with them, although he is fond of telling them that Narnia and Asland do not exist and are just a figment of their imaginations.

They arrive to find that King Caspian has decided to take a voyage on his royal ship, the Dawn Treader.  He plans to sail to the end of the world and find out what lies there and along the way.  He has pledged to determine the fate of the seven lords, friends of his father, who went on expedition when Caspian was a child and then never returned.  Lucy, Edmund and Eustace accompany Caspian, along with other characters the reader has met in previous books of the Chronicles.

The company encounters many strange lands and people.  There is the Land Where Dreams Come True, the Land of Deathwater, the Land of the Dufflepods, and the land where three of the lords are found to have been asleep for years.  The reader is drawn along on the adventure, interested to hear what will befall the company next.  At the end of the book, Caspian returns to Narnia, while the children return to their world.  This book is recommended for readers of all ages, and is especially recommended for families to read together.