Book excerpt: In this fanciful tour of the afterlife, Albrecht Gralle poses some hard-hitting questions: What if anyone could get into heaven? Would you want to go? Is it really possible for a rational person to believe in a God who can't been seen or touched, who would permit so much suffering in the world? Grounded in descriptions of heaven and hell from Swedish scientist-turned-theologian Emanuel Swedenborg, this exploration of the worlds of spirit speaks to anyone with doubts about spiritual belief.