Two complete Frank Aubrey novels (A Queen of Atlantis, and its sequel The Devil-Tree of El Dorado) are collected, showcasing the "Lost Race" genre and full of strange creatures, natural marvels, ancient peoples, political intrigue, and desparate battles.
The first and main pseudonym of UK civil engineer and author Francis Henry Atkins (1847-1927), who contributed widely to the pre-sf Pulp magazines, writing at least three Lost-World novels along with much else.