I'd like to divide three classes of reasons to read a discipline:
1) You are curious and want to begin reading by something 100-500 pages. I'd go for Pinker's 1990's "How the mind works"
2) You want to screen the whole field, by reading something 500-1500 pages. I definitely recommend David Buss 2004 "The Handbook of Evolutionary Psychology" which defeats the usual SI recommendations on the field
3) You want to know the state of the art of the field, so you really need something that is very recent, say from the last 2 or 3 years at most. This is me. Please help me if you know what should I read. 300-1500 seems a good interval.
Just for a comparative, in Cognitive Neuroscience, 3 would be 2009 "MIT The Cognitive Neurosciences IV"
Post your opinions on what 1 2 and 3 should be for Evolutionary Psychology.
Oh, and if you like Evolutionary Cognitive Neuroscience (a field so new I don't know any of the 3) please post yours too...