I just finished reading Pres Gillham's book, No Mercy, and all I can say is "wow."
I thought Pres' Grace in Ungracious Places was really good, so I couldn't wait to read this one. I loved the first chapter and was really getting into the whole fishing, brothers and llamas thing when the book hung a serious left and went all Pilgrims Progress on me. (At which point, I thought...oh no, an allegory...) But I kept reading and once the initial story was set I was hooked.
The major theme of the narrative is about love...not the ability to give love but the ability to receive it. I'm not sure I've ever read that story before.
The insights were powerful. And in fact, I don't want to overdescribe them because I'm afraid it might spoil the experience of reading the book. I will say that I've lived the meeting about the serifs and the sans serifs...but I never looked at it in the way that Pres powerfully depicted it.
The thing about allegory is that it isn't explicit. The reader connects and gets what they need--with each person finding something different.
Buy and read this book.