Segdewick is a breezy read (well as breezy as an algorithms text can be). It has somehow never been considered a canonical tome, but I thought it was a decent introductory text.
I was expecting Sedgewick to be in the list---I've never seen Dasgupta---since it's one of the most commonly seen, at least on the cubicle bookshelves I've browsed. It seems as canonical as any.
