1) SAS is providing free access/downloads of some e-books until April 30th. SAS produces the statistical software packages SAS and JMP which some of you may be using for data analyses. Available books:
https://support.sas.com/en/books.html

2) Springer is doing the same. Lots of relevant titles here:
https://link.springer.com/search/page/1?facet-content-type=%22Book%22&package=mat-covid19_textbooks&facet-language=%22En%22&sortOrder=newestFirst&showAll=true