The Pilgrim's Progress

I put off reading this for the longest time after I saw it in the Book of Lists as the most boring book in the English language. Not so. For a Christian reader, this is one of the most insightful allegories of the spiritual life ever written. The characters and adventures will make immediate sense. Some passages made me extremely uncomfortable. You can always tell the difference between a Christian author who's been there and one who saves his religion for Sundays. I found it entertaining and inspiring. Boring indeed! Even for an atheist it's interesting for the myriad of idioms that entered the English language through Pilgrim's Progress - Vanity Fair, Slough of Despond, etc.