Three children come across a mysterious library in the place where they are living. They soon meet the librarian and learn about a prophecy. Armed with books and few instructions, the children exit the library through one of the doors and embark on an adventure. Their mission is to replace the Great Sword of State. Of course to do that they must face dragons, peril at sea, and a traitor.
So...my opinion. What I liked was the prophecy and how it was revealed bit by bit. I wish though that the characters names were a bit different (too many E's). It made it a bit difficult to tell some of them apart. Overall I liked it but I wish it had a bit more mph to it.