They've produced a list of suggested reading for people who want to get into this stuff, but who perhaps don't know the mystery/thriller/spy genre well enough to pick out writers they might like.  

I won't copy the list here because it's their copyright, but it's only a click away and will open in a separate window.  They have it sorted by category, type and period.  As it happens, I am <ahem> on the list in the Greek/Roman section.