Available on Project Gutenberg for free download...

"Retells the Noah story, but with a flood from outer space"

In The Second Deluge, filed with scenes of panic and disaster, the entire surface of the earth is submerged when the solar system enters a watery nebula, and only scientist-hero Cosmo Versal, and a small group of friends who believe in him survive by flying above the flood in a newly invented skyship.