Oh man Timothy Zhan's books were so good. There was that duology and the trilogy. Hand of thrawn was the two books right? Big time childhood memories. Had like 4 of the "The essential guide to ___" books too. The one with the spaceships and vehicles, along with history and schematics was my fav. Incredibly nerdy, but it was cool to just get into it and think about what it would be like if it was real...
And for the best prequel, I'm thinking Revenge of the Sith. So dark, so much raw emotion. It tied all the happy bullshit from the first two into the original trilogy. Kinda put it into perspective a little more for watching the other three a bit to me.