There is no required textbook for this class; however, if you want to buy a stylebook specific to journalism–different from MLA, APA and Chicago that you use in your university courses–this is the one to get. There is an online version also, but I like the printed copy.
You can buy them on Amazon at https://www.amazon.ca/Canadian-Press-Stylebook-writers-editors/dp/0920009506
They do update it every year or two, but the basic don’t change.