Using the essential reader's guide, ive just started a chronological read through, beginning with "Darth Plaguies" even though the author put that book right after Episode I. Then I plan to read all the novels, since i own them all. I have none of the young adult books, but i'm not really worried about those anyways.
If I remember correctly, Darth Plagueis is after Episode I because it weaves togetherthe books leading up to Episode I
The book covers a time period ranging from around 67 BBY all the way to during and just after the time frame of TPM.