Light novel author Noboru Yamaguchi will not be able to continue writing The Familiar of Zero (Zero no Tsukaima) series early next year as he had promised, due to his re-admittance to hospital for another surgery. He wrote a message on Twitter promising he would continue writing when he returned to full health no matter what, and apologised to fans for the wait. He also thanked everyone for their words of encouragement.
Yamaguchi had previously struggled with cancer that had, at first, seemed inoperable; in an unrelated gallstone surgery, the tumour was found to have shrunk, and he reported in August that the surgery to remove it had occurred without incident.
The Familiar of Zero series began back in 2004, and Yamaguchi had planned to end the final arc of the light novels this year before his cancer diagnosis and subsequent operation. The light novels inspired multiple anime adaptations, the fourth and final of which, The Familiar of Zero F, was released in January this year.