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Of all those books, I've read only 'Introduction to Algorithms' (well, not whole, but parts of) and I wouldn't call it bad. It was a bit tough (but I may be biased, since I was reading it in highschool and it was one of first 'technical' texts I've read) but gave me good overview of most popular algorithms and techniques. It is also recommended at my university, and most of friends have similar opinion to mine. Also I think it will make you a better software engineer - I can't imagine somebody being a good engineer and knowing less about algorithms than I did in highschool. Sure, you don't use Graham's algorithm for convex hull everyday, but it's good to have some basic understanding of how to do geometry, graphs or some familiarity with NP-completness.