Eep. I hadn't looked at them because I was at work (can download, sometimes, but not read ebooks). Sorry.
Maybe if the spots for them exist, they'll eventually be real files? (I suppose it's most likely they won't bother because "everybody likes PDFs," right? Grr.)
ETA: The PDFs have bad metadata.
The Last Cowboy is named "17LastCowboy.pdf" with blank metadata.
The Horseman's Son is named "19DeloresFossen.pdf" and has nothing in the title/author metadata fields, so the PDF name is what shows up in the Reader.
A Family of Her Own has "SDM_978037371195.indd" in the title field, and "nhatsiosx" in the author filed; that's what'll show up on Sony Readers. (And maybe other e-ink readers?) I just love it when PDFs are made by outputting InDesign files with no touchup for use by PDF readers.