“A First Course in Probability by Sheldon Ross, 9th Edition.” It checks all the boxes of a pain–in–the–ass textbook: 1) It’s required. 2) The one–month–old 9th edition invalidates the 8th edition that everyone from last semester’s class is trying to sell. 3) On Campus Express it’s $194.
Enough is enough. I'm finding a reasonably priced textbook, damnit.