# What is the best book learn Galois Theory if I am planning to do number theory in future?

What is the best book learn Galois Theory if I am planning to do number theory in future?

In a year i'll be joining for my Phd and my area of interest is number theory. So I want to know if there is any book which emphasizes on number theoretic applications of Galois theory.

Steven Weintraub's Galois Theory text is a good preparation for number theory. It develops the theory generally before focusing specifically on finite extensions of $\mathbb{Q},$ which will be immediately useful to a student going on to study algebraic number theory. It also has some material on infinite Galois extensions, which will be useful with more advanced number theory later. The book has an elementary approach assuming as little mathematical background and maturity as possible.