Please include links to their blogs, books, or articles, if possible.
closed as not constructive by Joel Spolsky♦ Jul 28 '11 at 3:23
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Ones I know and like a lot:
They might not be "top", but they're worth reading. Jurgen in particular introduces a lot of other concepts which are related to his style, so if you're looking to find out what you don't know you don't know, read his first.
Rework from the 37 Signals guys gives you a really different spin on Project Management.