These are two books from the 'Sword Girl' series by Frances Watts. The first book in the series is 'The Secret of the Swords' and this sets the scene for the next 4 books. It makes sense to read this first but it is not essential to read the books in order. These stories are fun and quick to read. They have interesting story-lines and a cool heroine called Tommy. You will find this series in the Adventure section of the Hub.