These are some good resources for books online.
https://www.ryanandcraig.com/
https://www.getepic.com/
https://bookflix.digital.scholastic.com/
https://www.uniteforliteracy.com/
http://explore.proquest.com/sirsdiscoverer/researchtopics/nonfictionbooks/151759/3?sortby=trending&displayas=grid&accountid=1909
