Essential (Almost) Language Agnostic Programming Books

Scott Hanselman posted about six essential language agnostic programming books. I agree on not being bound to one language. Currently my most used language is C#.

A while ago I created an Amazon listmania called Building a Solid Core, that focuses on a bunch of language agnostic books mixed in with some killer C# books.

Check it out here, as I feel that all of the titles on the list are essential reading.