This season's footwear is so good that we failed at choosing our top five pairs. Confession: We couldn't even narrow it down to our top 10. Instead, after much debate at the Who What Wear offices, we're declaring these the 20 best boot styles for fall. Ready for some fresh action south of your ankles? Prepare yourself: These are the most covetable boots of the new season, conveniently divided up into four major must-know trends.