...And Mercury

Mercury must be the most frequently fictionalized planet after Mars, Venus and Jupiter:

Isaac Asimov set one robot story and one Lucky Starr juvenile novel on Mercury;

the opening story of Larry Niven's Known Space future history is set on Mercury;

again, Arthur C Clarke has a story set on Mercury;

and again, Poul Anderson excels. See Strangers and Vulcan's Forge.

"Strangers" also discloses yet another feathered, owl-like Martian. See recent posts.