Shifting Sands, by Frederic Burton, is another novel published by Rand McNally in 1898 with a cover design by W. W. Denslow. The title feels prophetic, as the Shifting Sands became the name of one of the deserts surrounding the Land of Oz. I doubt that there is any connection between the two, but it's always fun to run across a coincidence of this sort. Tradition has it that L. Frank Baum's final words were "Now we can cross the Shifting Sands".
This is another example of Denslow designing a wrap-around cover. The image carries across the spine to the back, where a small couple stands looking out to sea. Denslow's ubiquitous seahorse signature is at the lower right on the front cover.