But then the first book after the Prequels is about? Darth Vader between Episode III & IV! And how do find out more about the Clone Wars? Watch the cartoons in 2004 & 2005! How do we get to know more about the prequels, read Labyrinth of Evil, because it gives more insight on alot of events that lead up to ROTS. But then again, don't, because they are not canon.
I never cared to read the OT books in the 70's/80's, cause they weren't these burning questions after watching each movie back then, it was all there, and if it wasn't there, it still made sense. Now you have to read some of the PT books to get more insight. But then again, they are not canon.