In the last four months I wrote a draft of a possible textbook on decision theory. Here it is.
I've used these notes as basis for my honours/MSc course "Belief, Desire, and Rational Choice". They're tailored to my usage, but they might be useful to others as well.
The main difference to other textbooks is that I talk at length about the structure and interpretation of subjective probabilities and utilities. In part, this is because it makes a great difference to the plausibility of the expected utility norm whether, say, utilities are defined in terms of individual welfare, in terms of choice dispositions, or taken as primitive. But I also think these are independently interesting philosophical topics.