As miz_geek said, it's a subset of the larger collection that's being offered. Since I'm not at scholar, I can only ask for the keyed books in sgml/xml. But I don't know if those file formats would be of any interest for the Mobile Read library.
Scholars wishing to obtain a plain text version of these documents may contact Professor Mandell directly (laura.mandell @ gmail.com). Those wishing to receive the sgml/xml files can contact us at tcp-info @ umich.edu.