A book can have a photo in it's pages, and a photo on the front cover. On = at the surface, In = under the surface.
2014年9月22日
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Generally, you would say that the photo is IN the book. "On" can be correct in some special cases, as mentioned above.
2014年9月22日
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Thank you very much!
2014年9月23日
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If your photo is found inside the book, then it is in the book
If however you placed your photo on top of the book, then it is ok to say that it is on the book