The Muffler's Mission. The Mufflers, #2

The sequel to The Muffler's Ministry After the Battle of Gooseport, Portsea may never be the same. People call for change, but a more urgent threat emerges to cause the Mufflers to reevaluate their priorities. Of course, Rowan Webb's priority is Tia Tobin, but his Dad accidentally ruins things once more. Rowan can't even find a way to blame Dave Elkington this time. Personal matters have to wait. The lingering dangers from the old world can't be ignored, so the Mufflers head out to prepare their neighbours for the threat.
The welcome isn't always a friendly one. Things quickly go awry. Rowan and Tia are set on a collision course again, hurtling towards a showdown with the past. All roads lead to Ringwall, but what lies within that mysterious region?