This is an interesting twist on providing access to books: allowing patrons to print their own copy. This article describes a machine that prints and binds books on demand, allowing students and professors to make their own textbooks or study materials for far less than traditional textbooks. Texts must with within copyright regulations and must be in pdf format. While not technically a print-to-digital issue, the texts must be digitized before printing.
Springer eBook Collection claims to be "The World's most comprehensive online scientific book collection." There are some contact names on this website that we may want to include as interviewees in our study.