About 1/2 of the textbooks came from the old course outlines (e.g. https://ece.uwaterloo.ca/~ece207/ https://ece.uwaterloo.ca/~ece207/) and class shopping lists

About 1/2 of the textbooks came from the old course outlines (e.g. https://ece.uwaterloo.ca/~ece207/ https://ece.uwaterloo.ca/~ece207/) and class shopping lists on UWaterloo book store. About 1/4 were guesses, and the other 1/4 I don't know where to even start looking. The higher the course the lower the confidence of having the right book.