Simply fantastic! One of the better crossovers I have read in recent times. The story is centered around Thor and Odin and a new enemy called The Serpent. 
 The Serpent is quite an enemy for the Avengers to face. Without giving too much away, I can easily say that the superhero fights, the villains and the resulting chaos was an absolute delight to read. I have mixed feelings about the ending but it made sense and moves the whole Avenger universe forward. 
 Absolutely a must read!