I think one book that changed a lot was the Qur'an - it made me an atheist. I don't come from a muslim background but it made me realize, how some religions (well at least the abrahamitic ones) came to be.
I am not a muslim and see multiple sides of islam but you cannot just say- Qu'ran you have to mention the editor as well. (Unless you read the original arabic version).
It matters a lot since I've seen eastern books having hugely varying translations.
For example, an Indian friend of mine tells me that 'I am become God ... ' is a very inaccurate representation of the original hindi text
I read various translations, scientific editions by (german) islamic schoolars - I know there are other versions out there which are more white washed.
I can especially recommend Bill Warners "An Abridged Koran", if you believe there are errors in his translation, please let us know.