Who Is Thor? That's the question on everyone's lips. Most especially Prince Odinson of Asgard. Now, he starts to narrow down the list of suspects. Meanwhile, tensions continue to flare between the All-Mother and All-Father, Malekith forges his most dangerous pact yet, and Thor prepares to face her greatest challenge! Collecting Thor Vol.6 #6-8 & Thor Annual #1, plus extra 'classic' story 'What If?' #10.