The Last Iron Horse — Kristan Cannon

Their biggest test is hurtling towards them...

... On steel rails.

With the corrupt Colonel to their east, and the slavers to their west, determined to both call Walden's rich resources their own Derek, Sheridan, and Garrett have to act quickly to make sure their home isn't the next to fall to the pressures from outside... and within.

Derek swore he would never get pulled into another adventure...

After nearly being killed protecting Lively, Derek returns to Whitefish and learns Garrett was at the nearby High Falls. Still recovering from the injuries gained in Lively-- with no guarantee of still finding his friend alive--he embarks on an expedition up to High Falls to find Garrett.

But finding Garrett ends up being the least of their worries when he discovers that the slavers to their west have an operating train with a clear path straight into the fledgling Kingdom of Walden's heart--and to their new Queen.