The Al Quds Brigades, part of terror organization Islamic Jihad, has just published an illustrated book about the IDF to help its fighters understand the enemy.
Chapter 1 gives an overview of the IDF, ranks and levels in the organization. Chapter 2 concentrates on the infantry, Chapter 3 the navy and Chapter 4 the air force.
The book also analyzes the IDF's strategy for fighting to it can be ready for the next war.
As far as I can tell, there are no secrets in the book. But I would be surprised if it wasn't directed and bankrolled by Iran.