i can't suggest a specific book, but i have two suggestions for you. 1: go see a nutritionist, just for one or two visits. the nutritionist may be able to reccomend a book or two, as well as answer any current questions your wife may have. 2: search for nutrition books on amazon and read the reader reviews. granted, in general (i'd assume), most people onlypost reviews if they're gonna be really positive or negitive.
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