http:https://link.springer.com/openurl?genre=book&isbn=978-3-662-44874-8
http:https://link.springer.com/openurl?genre=book&isbn=978-3-319-13072-9
http:https://link.springer.com/openurl?genre=book&isbn=978-3-319-47831-9
http:https://link.springer.com/openurl?genre=book&isbn=978-1-4612-1844-9
Links of books can be found in Free+English+textbooks.xlsx
pip install -r requirements.txt
python download.py springer_links.txt download