SARO http://www.sarp.pl is the first on-line book lending service in Poland. It has existed since 2003 and it offers approximately 10.000 books to its users. The service is not free of charge. Each client must be registered and is obliged to pay a subscription free once a year.
SARO delivers books to its users via mail or other delivery services.
SARO offers belle-letters mostly, not only in Polish but also in English language.