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.
2014년 9월 22일
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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.
2014년 9월 22일
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Thank you very much!
2014년 9월 23일
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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