In LibrarySearch, books, ebooks, and journal articles look similar:
This is a book:
This is an ebook:
This is a journal (journal articles are almost always online, although some have in print copies)
Empirical Journal Articles: contain specific information about an experiment a professor or doctor did on a specific topic. These articles have created new knowledge and have moved the field forward.
Literature Review Journal Articles: contain a summary of the research done on a topic up to this point. Think about Literature review articles as the 35-second summary before the first episode of a new season on Netflix. It's catching the reader up on all the information that happened before
Book: contains background and foundational knowledge on a specific subject. Often you can find an overview or summary of your topic by looking at the table of contents and choosing one or two chapters to read or by looking in the index for the specific pages on your topic.