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			Where books of a series are published at widely spaced intervals (six months or a year) then I think a recap is probably appropriate - but keep it short, a just a few pages covering just the essentials.  This is necessary because a significant proportion of people do not re-read books, and human memory is quite fallible.  (Typically I would re-read a series before continuing with a new release.) 
 
Where a series come out together, or very close, I don't think recaps are essential.  If people are enjoying the series they will keep reading (immediately or quite quickly), and if not the recap is pointless anyway.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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