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For a "survey" of Galois theory of commutative rings, there is one book:

The Separable Galois Theory Commutative Rings by Andy R. Magid (1974).

which has a nice section summarizing the state of the development up to 1974.

There is also a more general book aiming at a topo-theory topos-theory style general Galois theory (although I haven't read it)it) including also a nice survey:

Galois Theories by Francis Borceux and George Janelidze (2001).

show/hide this revision's text 1

For a "survey" of Galois theory of commutative rings, there is one book:

The Separable Galois Theory Commutative Rings by Andy R. Magid (1974).

which has a nice section summarizing the state of the development up to 1974.

There is also a more general book aiming at a topo-theory style general Galois theory (although I haven't read it):

Galois Theories by Francis Borceux and George Janelidze (2001).