To answer the question the title of this book seems to be going off of: No, Casper is not saved. That he holds to atheist beliefs is evident throughout the book he co-authored with Jim Henderson. The two wrote another book together in which they conversed about the churches they visited and what was best and worst about them. "Saving Casper" talks more in general about evangelical efforts to convert and save nonbelievers.
While I was very interested in what Casper had to say, I also constantly found myself wanting to yell at the book about what wasn't being pointed out in return to Capser's comments. Of course, since the point of the book is not to debate about what to believe and what not to believe, I suppose it's possible Jim has addressed my concerns in private. Still, Jim's insistence on developing relationships through connections and conversation bugged me a bit. The point is right - to love rather than hate - to act rather than speak - but the seeming statement that all debate is bad because it is full of hate (I may be exaggerating a bit here, but you get the point) hits me the wrong way.
I've always believed that God calls different people to different things, gifting them with different talents. To me, that includes debate, and while I'm no debater, I've found that watching skilled debaters consider major issues has helped me develop my own faith and find reason to defend my faith. I also think that there's a place and time for relationship-centered loving action evangelism, but that does not rule out the importance of speaking truth.
All that said, I would still recommend this book. I plan to reread it some day, as it has plenty to think about.
*Disclaimer: I received this book for free in exchange for my honest review of it.