Troubletwisters Book 4: the Missing

The fourth installment of the thrilling middle-grade fantasy series from bestselling authors Garth Nix and Sean Williams.

Jack and Jaide Shield have defended themselves against The Evil before -- but it's never been as dangerous as this.  It isn't just the town of Portland that's threatened, it's the whole Earth . . . and certain dimensions beyond.

The Wardens have devised a plan to get rid of The Evil once and for all.  The only problem is that destroying The Evil may also mean abandoning some innocent people -- including one of the twins.

The battle against The Evil is going to places it's never been -- places Jack and Jaide would have never even imagined possible.  Their mission is clear:  survive the storm that's coming, and save the ones who are missing.