While we are all doing our learning and researching remotely, there are still many books and articles available electronically! You can use search filters in Tripod to search only for books available in a digital format, for example.
Literature reviews and bibliographies are useful for finding lists of sources about a particular topic that someone else has already pulled together for you. Annual Review present this information as essays written by experts that review an area of interest to scholars. Oxford Bibliographies are thematically arranged annotated bibliographies created by librarians specifically for undergraduate research projects.