For this Throwback Thursday I recommend: The Hobbit by J.R.R. Tolkien.
Bilbo Baggins, a respectable, well-to-do hobbit, lives comfortably in his hobbit-hole until the day the wandering wizard Gandalf chooses him to take part in an adventure from which he may never return. He becomes a thief for a band of dwarves and soon finds himself in the midst of a war with the evil goblins and wargs, and forced to make a decision between the call of duty and the pull of the simple life.
More accessible to younger readers than the Lord of the Rings trilogy (and much better than The Hobbit movies by Peter Jackson) this is a great epic fantasy classic for children. This book was first published in January 1937 in the U.K. For those who enjoy detailed world building, memorable characters, and a great adventure and quest this is a good recommendation – readers who enjoyed The Chronicles of Narnia may also enjoy this book.
You can find The Hobbit in the Juvenile Fiction section at J TOLKIEN, and the Young Adult Fiction section at YA TOLKIEN.