I just started rereading the series tonight. I bought the books 1-4 set on my Nook because I figured that's where I want to read the series for now. I'll buy a nice paperback set once all the books are out, I don't like having a mix of paperback and hardcover with varying cover art styles.
Unfortunately I have learned that the Nook version of the 1-4 set does not show up as 4 different books but a single 3000+ page monstrosity. AUGH.
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Black Turtle spilled my diet soda!