From: Washington D.C.
Truth be told, in the abstract, not a lot has changed since the Vietnam war. The Vietnam war, and the Linebacker Campaign in particular, is interesting in part because it was where many of the tactics which have persisted to this day were created (e.g. strike packages, gorilla strikes, precision guided weapons, ever larger numbers of support aircraft, and the defenses against them).
The best book I've found that talks about IADS, is a book called Strike Warfare in the 21st Century by Dale E. Knutsen. I like how he talks about how air defenses are layered up (something a lot of scenario builders could stand to learn). He's a China Lake guy, so the book is targeted at new engineers who know nothing about air warfare looking at building advanced munitions.