They changed single 'p's to double 'p's, e.g. "worshipers" to "worshippers". I wholeheartedly approve of this change but I'm surprised because the Society always used to use double 'p's, so I don't know why it was ever different here.
They changed "evildoer" to "criminal" on page 36, probably as a reflection of the change in the NWT's wording; this is not a word in a scriptural quotation but in the book's own text.
Page citations were changed from the style "197-9" to "197-199", also a sensible change.
The statement on page 51, "He experienced harsh whipping, cruel impalement, and an agonizing death on a torture stake" now reads, "He was whipped and nailed to the torture stake, suffering an agonizing death" since the rNWT no longer uses the word "impale".
Images of the NWT have of course been updated from the old black-cover appearance to the gray-cover appearance, including on page 54 where they Photoshopped a woman to be holding the new Bible instead of the old one. In so doing, they did a cheap job of painting a shadow from her hand on the new gray cover.
"As you grow in knowledge of Jehovah" on page 55 is now "As you come to know Jehovah", reflecting the change in John 17:3 in the rNWT. In line with this, the sentence immediately preceding the John citation says "get to know the Great Giver, Jehovah" instead of "get to know more about the Great Giver, Jehovah".