I second the endorsement of the Feynman Lectures vol. 3 for people as young, bright and well-educated as Doug S (who has a degree in math). I say “young” because it becomes much harder to learn as you get older. Although it does not mention the many-world interpretation, it seems to have the best reputation for helping people learn the core of the subject matter, which has nothing to do with interpretation.
I second the endorsement of the Feynman Lectures vol. 3 for people as young, bright and well-educated as Doug S (who has a degree in math). I say “young” because it becomes much harder to learn as you get older. Although it does not mention the many-world interpretation, it seems to have the best reputation for helping people learn the core of the subject matter, which has nothing to do with interpretation.