I have Off the Record in print -- it's softbound and there isn't an ISBN; it was POD, I think, purchased before I bought my e-reader. I remember really enjoying the book, too. Maybe it's time for a reread.

Thanks for the Heyer mention. I saw An Infamous Army at Borders last week (left without buying any books for myself!) but didn't feel motivated to pick it up. Austen always works, but I've nearly worn my copy of Persuasion out.