I do not have the answer for all unsaved, but I do recommend this really cool, short read. www.jesuswho.net Here is a little free book in multiple e-formats which is a stealth Evangelical history book. It tends to hook a reader and then give them Gospel information in a nice way. It will likely not offend people hostile to Christianity, but it may pique there interest. I hope you will look it over and if you find it good enough, please pass on to an unsaved friend or family member.