George Pérez hits a home run with “Sirens,” his new creator-owned comic published by Boom! Studios. Striking from various times and places, Pérez delivers a story that looks every bit as good as his landmark work on such titles as Wonder Woman and Scarlet Witch. This new six-issue run has got it all. We begin in Iceland in 1104 and a ragtag group of Norsemen marauders have grown impatient with Fanisha, a mysterious mystic, who had promised them a treasure to be had at a legendary cave. Little do they know, Fanisha has plans of her own.