You can find the textbook online. Easy professor because he reads verbatim from the textbook. Releases practice exams that are similar to the actual ones.

good class. theres a general structure throughout the class and if you conceptually understand everything, it should be good. I studied a lot with classmates which helped a lot. The class gave me basic knowledge for a lot of other cs classes that I took later.

Professor Jeong's pacing for the class was fairly slow (which I didn't complain about lol) compared to the other probability electives. Midterms/finals were essentially just like the homeworks with certain problems having a small twist to them where you had to think outside the box. Plenty of partial credit was given. He is very nice and accommodating; in fact, during one of our midterms, he gave everyone who still was working on the midterm in the last 5 minutes an extra 15 minutes (even though the allotted time was more than enough). Averages/medians were 85+. Overall, not too bad of a class, highly recommend him.