As many of the responses here have shown, Japanese kanji can have multiple readings, depending on the context. By trying to read a book one character at a time, you are 100% guaranteed to be reading it WRONG.
If you would like to see how your book would sound, try pasting a paragraph here and we can help you with that. If you are interested in actually learning how to read Japanese, you should go about it a different way. If you are not interested in learning, then you shouldn't be posting here.