Many people understand that, at the end of all things, Christ returns, God will create a new heaven and a new earth where those who have trusted in Christ will live with him for ever. But what about those who have "passed on" well before this? Where are they now? What does heaven look like? What will occupy us there? When David Oliver faced the death of his son Joel, at the age of 38, following a short and brutal fight with cancer, he set about researching...