My Best Friend is an Eldritch Horror, Vol. 1 (Graphic Novel) : Volume 1

Good things come to those who wait. Damien Vale didn't, and now he's bound to an Eldritch creature from beyond the farthest reaches of the universe. It's unfathomable, utterly evil, and likes to be called Henry. To Damien, none of that matters. He wants to learn magic, and he'll be damned if he lets something as small as a world-ending monster set him back.