hoopla digital, the category-creating mobile and online service for public libraries, today announced a new agreement with Marvel Entertainment that adds over 250 collections and graphic novels to the service. Through this agreement, patrons of participating public libraries can now borrow Marvel works like, THOR: GOD OF THUNDER VOL. 1, BLACK PANTHER: A NATION UNDER OUR FEET BOOK 1, CIVIL WAR and X-MEN: THE DARK PHOENIX SAGA via hoopla digital on their smartphones, tablets and computers. Marvel content arriving on hoopla digital includes heroes…