In the book of Psalms, it's written: "The LORD has established his throne in heaven, and his kingdom rules over all" To the Jewish mind, heaven is not a fixed, unchanging geographical location somewhere other than this world. Heaven is the realm where things are as God intended them to be. The place where things are under the rule and reign of God. And that place can be anywhere, anytime, with anybody.
Now if there's a realm where things are as God wants them to be, then there must be a realm where things are not as God wants them to be. Where things aren't accodring to God's will. Where people aren't treated as fully human.
It's called hell.
Rob Bell, sex god, p. 21
If there is any doubt that Bell is saying that Heaven and Hell are things or condition here on Earth, in this present world, read a page further.
When Jesus talks about heaven and hell, they are first and foremost present realitites that have serioius implications for the future. Either can be invited to earth, right now, through our actions.
It's possible for heaven to invade earth.
And it's possible for hell to invade earth.
I don't know if some other part of the book deals with his thoughts on after-death matters, but at least from that little bit, Bell is pretty much saying heaven and hell are here, that we humans make our own heaven and hell here on earth.
It would be interesting to know where he gets this stuff. For example, one can look at Jesus' story of the rich man in Hell to see that he didn't wind up there until after he died. One could as well look at Jesus' words to the criminal at the crucifixion, telling him he would be with Him in Paradise, to know that if one is promising Paradise to a man soon to die, then that Paradise has nothing to do with this present world.