Up for sale as a single lot are 2 self-published books by Upton Sinclair:

Upton Sinclair
The Brass Check: a Study of American Journalism
Pasadena, CA: Author. Very Good in boards. Soiling and edge wear to front and rear panels. No date evident, c. 1918
Upton Sinclair
The Profits of Religion by Upton Sinclair 
Pasadena: Upton Sinclair, 1918. The Profits of Religion an Essay in Economic Interpretation. Bound in the original publisher's hardcover boards, titled in gilt to the spine and upper board. This is the second edition, with the note on pg. 157.

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All items are carefully wrapped in bubble wrap and shipped in boxes.