It's an impressive examination of how artists draw Buffy - it's a flash flip book which is not the easiest thing to look at but if you've been following the debates on the Season 8 artwork (representation and feminist) then this is a must read.
http://www.watcherjunior.tv/05/flip/schumacher_flip.html
http://www.watcherjunior.tv/05/flip/schumacher_flip.html