these are 2 hardcover books by Shel Silverstein.

the titles are
Where the sidewalk ends and 
a light in the attic.
both are used but in nice shape.
the only sign of any wear is a tiny bit of water stain on the paper sleeve of Where the sidewalk ends, but its just the dust sleeve, not the book, and it is minor.
both books are clean and perfectly readable.
very enjoyable humor and poetry.
smoke free, pet free home.