One criticism: I bought the print version, and there are a few illustrations there that were obviously done in color for the e-Book version, but they wind up in black-and-white in the print version. Surely it could have been easy enough to change the way these illustrations looked in black and white to optimize it for the print book e.g. using dotted or dashed lines, or more strongly contrasting shades of gray? I felt rather frustrated at that. However, it was the only problem I encountered (it only affects literally a few small things) and it was not a major drawback. I still give the book a full 5 stars, it's still great despite this minor issue.
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