The fifth book of this internationally best-selling series, Syren finds acclaimed author Angie Sage's characters all in a bit of a bind. Septimus, Spit Fyre, Jenna, and Beetle are stranded on an unusual yet beautiful island where Septimus is hearing a strangely alluring song. Lucy and Wolf Boy have run into a few shady sailors out to sea. And what is this unknown treasure Jenna's father has aboard his ship?