The Handbook of Rationality (2021, MIT press) is now open access

Of particular interest here is section 4.1 on subjective accounts of probability and section 8.4 which explicitly addresses Knightian uncertainty and its challenges for Bayesian accounts.

https://​​direct.mit.edu/​​books/​​oa-edited-volume/​​5525/​​The-Handbook-of-Rationality