Runaway Train Books in Order

Runaway Train is a short, connected series with a slightly different feel from Maddie Evans's Maine-set romances. These stories follow Casey Marrón, a runaway and rail-hopper who lives light, trusts sparingly, and keeps one eye on the next escape route, and Peter, the steady young man who is drawn to her even though his whole life has been built around plans, rules, and responsibility.

The contrast between them does most of the work.

In Highway of the Heart, Casey arrives in Sweet Grove as an outsider and is ready to leave just as quickly. Peter is helping at his father's business and preparing for the military. She is improvisation. He is structure. Their first connection grows out of immediate action, with abandoned puppies, a fence, and the kind of choice that tells you who someone is before they have time to explain themselves. The romance is sweet, but the deeper tension comes from a harder question. Can a person who has survived by never depending on anyone learn to stay?

Rules of the Rails returns to Casey and Peter when everything seems ready to shift again. School, enlistment, and adulthood are all looming, and then a medical emergency throws Peter's family into chaos. Casey is back in the mix, and the pull of the freight trains never quite disappears. The second book is shorter, but it sharpens the series theme of freedom versus belonging. For Casey, the rails mean movement and self-protection. For Peter, home means duty, even when duty costs him something.

These books are compact, but they are not flimsy.

They work best for readers who like connected novellas with recurring characters, family pressure, and a romance that has to grow up fast. Sweet Grove matters because it gives Casey something she has never really had, a place where people notice if she is gone. The series is about what it means to be wanted, what it costs to stay, and how love can feel both like safety and like risk. If you want a two-book arc with youthful energy, real vulnerability, and a strong sense of motion, this one is easy to sink into.