This series is amazing so far. I just finished the second one, out of three. They are very different and, as a twelve year old, in the middle of the first one they lost me and i put the book down for about a month before returning to it again but after that slow part i definitely fell in love with it. I believe this book is a lot of the journey they make after taking a test and being chosen to help their friend Mr. Benedict. Each of the children having in some way lost their family began to trust in each other and take a journey of a life time. The first one, personally, has a rating of 9 out of 10 and same with the second. I recommend this to all who love a little mystery and of course amazing and fun adventure.