Cambridge Books Online is the online content delivery service for Cambridge University Press's electronic book collections. The current MPG subscription comprises selected subject collections, additional content may have been licensed by individual Max Planck institutes. Max Planck authors can publish their scientific work at CUP as an Open Access eBook, with book publishing charges partly covered centrally. Further details are available on the MPDL website.

Including Oxford Scholarship Online (OSO), the University Press Scholarship Online (UPSO) publishes new books every month from an ever-growing roster of contributing presses, each adding to the variety of subjects covered on the platform. The MPG purchased the volumes 2003-2013/2014 of 16 OSO subject collections. This selection is continuously extended by single e-book acquisitions by MPG libraries.

SocINDEX is the world's most comprehensive and highest quality sociology research database. Subject headings from a 15,000 term sociology-specific thesaurus designed by expert lexicographers and extensive indexing for books, monographs, conference papers and other sources is included. Searchable cited references are also provided.