Streiker's Morning Sun (The Streiker Saga)

is book #3 of The Streiker Saga.
==Book Description==
Welcome to Beaconville It's a suspicious, unfriendly little town suspended in a dreary, bone-chilling winter. But when reclusive Dallas billionaire Fletcher Streiker receives a rambling letter from one of the residents asking for help, he decides to make a personal trip, bringing his wife, Adair, and their young son, Daniel. The citizens react with predictable hostility when Fletcher shows a little too much interest--and insight--into their doings. Inexplicable things begin to happen, such as pieces from Adair's past showing up around town. However, when Fletcher pushes the townspeople a little too far, she and Daniel are left on their own. And the only way they can leave--the only way anyone can leave--is on Fletcher's train, the Morning Sun.
(Description from paperbackswap.com)