A Sneak Peek at Purgatory
What is purgatory like? Has anyone been shown a glimpse of it?
Yes, there are souls who have been given a glimpse of purgatory. The best work describing this, the most balanced and most simple and the most applicable to our own life on Earth, is the Treatise on Purgatory by St. Catherine of Genoa. St. Catherine's account emphasizes the positive spiritual disposition of the holy souls and so avoids some of the kinds of descriptions one finds in other works that can be easily misinterpreted.
Another book, also very fine, instructive, and edifying, is Visions of Purgatory from Scepter Press. This press is an apostolate of Opus Dei, which is very sober and careful in its publications, so even though this book deals with private revelations, the theological sense behind them and the explanatory notes are excellent. It was approved by the late Bishop Henri Marie Raoul Brincard, who was the doctrinal officer for the Bishops' conference of France, and is very much to be recommended.