For those unfamiliar with the Marvel timeline, the events of 'Siege' occur towards the end of Norman Osborn's 'Dark Reign'. The main story sees Osborn declare war on Asgard, home of the mighty Thor. What follows is an epic battle between Osborn's Dark Avenger led H.A.M.M.E.R and the Asgardians. Then the real Avengers join the fray and the action really gets good! This is a massive book that collects all the core 'Siege' story. There hasn't been a crossover event like this since the 'Civil War' so it shouldn't be missed.