These two books seem imposible to find on the archive/genesis and currently the mhut forum for PDF requests is down. I understand that the Calculus one is very recent (eBook edition). But the other is from 2010. Could it be that the Fundamentals book never had an eBook edition? All i could find was the metadata:https://annas-archive.org/isbndb/9780470551387https://annas-archive.org/isbndb/9781009159692