Syren is by Angie Sage. The fifth book in the Septimus Heap series. Septimus, Jenna, and Beetle end up stranded on a beautiful island and discover themselves in the middle of a struggle to prevent the invasion of the castle by an army of warrior jinn. To save the castle and his family he must face a Syren, a traitorous ghost, and evil pirates. Another great installment in this charming series.
Ratings: 6th grade - 8 out of 10.