^It's ERRAND. And to the OP...The KRAD Klingon books ARE the best ones. John Ford's The Final Reflection is also pretty good
I wasn't a fan of this one. The characterization was a bit off, and the whole "revelation" about the reality of Kahless felt forced and didn't fit well with established lore.
Do you want books from Klingon POV or just books about Klingons? There is also some neat Klingon stuff in Full Circle.
How about TNG #31 "Foreign Foes"? Or #61 "Diplomatic Implausibility" (which, if I remember correctly, was retconned as the pilot for the "I.K.S Gorkon" series)?
I've read every piece of Trek fiction written by KRAD He's pretty much the Ronald D. Moore of Klingons in treklit, huh?