Read this book. It is wonderful and has really had a huge impact on my life. I wrote three different short posts about this, but I deleted them all. I either sounded like a holy roller, or a huge book snob by explaining that the novels I usually read, other than this kind of book, are real literature and how Nicholas Sparks is a bozo. I do, for the record, believe that last bit to be true.
I've read a number of books about faith and all that I can find on Heaven, but this book is especially unique and well written, in my opinion. I would highly recommend it. I wish that I could say more, but it turns out I'm kind of a jerk on the subject.