I'm going to study algebraic number theory by myself with the following texts:
- Algebraic Number Theory by Cassels & Frolich
- Number Fields by Daniel Marcus
But I'm not sure whether or not I should use a supplementary text for completeness. I believe I have sufficient background in algebra, as I read Lang's Algebra. Yet regarding number theory, the last book which I read is A Classical Introduction to Modern Number Theory by Ireland & Rosen. I prefer books with a lot of exercises, and I don't care about the price, since I will read books in library. The following texts are the candidates which I'm considering, and if you think the above two are not enough, could you recommend any of them?
- Local Fields by Jean-Pierre Serre
- Algebraic Theory of Numbers by P. Samuel
- Basic number theory by Weil
- Milne's notes
etc.