Mark and Jack enroll in the Universal Electrical & Chemical College, and meet the inventor Santell Roumann. Santell has discovered a new fuel source called Etherium, and together the group builds a rocket ship...
The adventuresome crew builds a submersible craft, the Dolphin, that runs on sea water and chemicals. On the maiden voyage they battle sea monsters, pass through a sunken graveyard, and discover an opening that...
Orphans Mark and Jack are fostered by Professor Henderson, with help from the professor's assistant Washington White and his friend Andy Sudds, the big game hunter. In their first adventures the Professor builds...
Dismantling the dirigible-ship Monarch & the submarine Porpoise, our crew constructs from the combined parts the Flying Mermaid which is both airship & submarine. They leave their home in Maine & head for a...
This is the story of how Bull Coxine with his crew of cutthroat pirates came within an ace of taking control of the space lanes by threatening to destroy the great Solar Alliance, and how Tom Corbett and his...
In or about the year 2000, humanity has reached "that incredibly lofty goal to which its intrinsic efforts can carry it" — but rejected everything but crass materialism. Technology has advanced to the point...
The astounding discoveries of Khan-li of Dimph-yoo-chur have thrown floods of light upon the domestic life of the Mehrikan people. He little realized when he landed upon that sleeping continent what a service...
That the gentleman in question was a nut was beyond question. He was an institutionalized psychotic. He was nutty enough to think he could make an atom bomb out of modeling clay!
The novel continues (from The Angel of the Revolution) the tale of a worldwide brotherhood of anarchists fighting the world armed with fantastical airships, ending on an apocalyptic note as a comet smashes into...
