I found this small book to be a fascinating take on the purging process of entering heaven.  I realize that no one wants to enter heaven with any stain of sin still on their soul but I had not thought a great deal about what that would mean - in terms of removal of any attachment to sin.  I find this a quite credible take on how that process is both joyful (heading down the home stretch to be with the Lord) and painful (giving up what you may have become quite attached to).  Really makes you think about all those little nonsense things we cling to when our focus should be on Jesus alone.