"Tarzan the Terrible"
Which is the sequel to Tarzan the Untamed (wherein Tarzan wantonly kills some WWI German ass).
In this book he goes searching for Jane in a previously undiscovered land in which meat-eating stegasaurs ("gryfs") terrorize the population of very-hyphenated-named non-human humanoids with tails. Yes, this land was previously undiscovered because it is separated from the rest of Africa by a terrible, terrible swamp.
Yeah, they crossed an ocean to discover the new world, but a swamp?
Stupid, entertaining, fun.
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...Trot and Cap'n Bill were free from anxiety and care. Button-Bright never worried about anything. The Scarecrow, not being able to sleep, looked out of the window and tried to count the stars.