The youngsters’ days are filled with adventure and excitement, including their successful attempt to avert a horrible train disaster; but the mysterious disappearance of their father continues to haunt them.

The solution to that painful puzzle and many other details and events of the children’s lives come to vivid life in this perennial favorite, a story that has captivated generations of readers and, more recently, delighted television and movie audiences. In this inexpensive, unabridged edition, it will charm a whole new audience of young readers with its warmth and appeal.