Anyways, I organize my book (yes - just one ;P) 
by putting the sketch (if i have one) on one page 
and the cel on the other. I do this because most 
of the time the sketch is JUST as interesting (if 
not more) than the cel :D If there is no sketch, 
then i put a another non-sketch cel across from 
it. I also bought "archival mounting corners" 
(the clear mylar kind) to hold all my cels in the 
middle of the page. I HATED when my cels would 
slip all over the sleeve! 

~Tara