Hi...I wrote the index for your book. Thanks so much for appreciating the it! We indexers rarely get a nod, so thanks! Indexing is a fairly geeky profession, and I think that's why you noticed. (They are made by actual people, who work mostly alone, in very quiet rooms, while drinking lots of coffee, sometimes through the night, etc...like the people you write about in your book.) Being Geek was really fun to work on. Best of luck with it!