What is the setting in the novel, A Gun for Dinosaur?

To the west, you see the arm of the Kansas Sea that reaches across Missouri and the big swamp around the bayhead where the sauropods live.

To the north is low range that the Raja named the Janpur hills, after the Indian kingdom his forebears once ruled. To the east, the land slopes up to a plateau, good for ceratopsians, while to the south is flat country with more sauropod swamps and lots of ornithopod: duckbill and iguanodont.

This is the view from where the time machine lands people in the Middle Cretaceous epoch. It is an exotic place, filled with shrubs, odd trees, and unfamiliar ground cover instead of grass.