Books in the Gigant series

"GIANT WOMAN VS. KILLER DEVIL. Thanks to anonymous votes on the underground website E.T.E., the Earth has suffered one calamity after another. Just as popular demand requested, a gigantic, towering monster is wreaking havoc across the world, and the only people who can stand against it are Papico and a team of time travelers from a ruined future. But with the revelation that Papico's pregnant, her battle for Tokyo's safety takes on a whole new set of stakes. Can she protect herself, her lover, and her baby from certain doom?"--