What are some good books/series involving Faustian Bargains

Faustian bargain, a pact whereby a person trades something of supreme moral or spiritual importance, such as personal values or the soul, for some worldly or material benefit, such as knowledge, power, or riches.

Yeah, I want people who knowingly or unknowingly make them very bad deals.

Just don't say Addie LaRue, or I'll have to make my own bargain to come at you.