Just finished reading Six Big, Big, Big Angels. It's about a little girl who fell of the top of the slide at her grandparent's pool on to the concrete patio below. The book was written by her grandmother and relates the girl's experiences when she was taken up to heaven (in between falling and hitting the patio) and subsequent visits to heaven.

Really hard to suspend disbelief at first (being a skeptical person). But wow. She was three or four at the time and describes so many things she couldn't have known in great detail.