Kimberly Kagan has a dossier on the acts of war (mostly by proxie) that Iran has been committing against the US for at least the past five years. We may not be at war with Iran, but they’re certainly at war with us, regardless of how much many choose to ignore it.
[Update late morning]
Here’s a book that seems timely: Iranian Time Bomb: The Mullah Zealots Quest For Destruction.