Below is a selective list of OA or OER books relating to journalism. So that you can read reviews and summaries, the links go to the book's entry in the collection I found it in: Web Literacy for Student Fact-Checkers goes to the book's entry in BC Commons, Data Journalism Handbook goes to that book's entry in Directory of Open Access Books, etc. There is overlap among collections and each collection yields between a dozen and a million hits for a simple search of "journalism".
Almost all of the resources listed here are searched by the Mason OER Metafinder and/or one of the other aggregators (MERLOT, OASIS, etc.) and include lesson plans, homework assignments, lectures, full courses, syllabi and more.
Many Open Access journal articles and books can be found through SouthernSearch by using the Open Access limiter on the search results page:
Open Access materials are indicated by the words Open Access and the orange OA logo: