Hatke's latest adventure is a wonderful and exciting page-turner, seamlessly blending dragons, giants, robots, and portals to other worlds, creating instant appeal for almost any young fan of graphic novels, fantasy, fairy tales, or science fiction...Perfection. --Kirkus, starred review

Retaining the humor, daring exploits, and dynamic cartooning of Hatke's previous books, the crossover is enjoyable and satisfying, if at times a tad predictable, and could serve as either a solid epilogue to both series or as the start of a new chapter in a larger shared universe. --Publishers Weekly

Hatke offers up a hit parade of characters both human and otherwise, with plenty of fearsome creatures in his classic style. --Booklist

Readers can hope this is the beginning of many adventures with this crew, but if it turns out to be the end of both series, well, it's an utterly satisfying one. --The Bulletin of the Center for Children's Books

Jack and Zita make a stunning team in this high-stakes adventure--a must for fans of both series. --The School Library Journal