The wonderful house-boat-train

The idea of living in something other than the traditional house has endless appeal for children, and this fulfills all demands. The story tells of a grandfather who was being retired from railroading; of his grandchildren, each of whom had definite ideas about the house in the country. This tells how that incredible house was achieved, and became a house-boat-train. - summary from Kirkus review

From the author of My Father’s Dragon series.