You can start by checking online e - book platforms like Amazon Kindle or Google Play Books. They often have a wide range of novels, including ones related to 'kuma kuma kuma bear'. Another option is to visit your local library and ask if they can order the novels for you if they don't already have them in stock.
One popular novel related to this could be 'Kuma Kuma Kuma Bear: The Adventure Begins'. It follows the story of a girl who gets transported into a game world as a bear. Another option might be 'Kuma Kuma Kuma Bear: New Horizons' which delves deeper into the character's exploration in the game world. There could also be fan - made novels that expand on the story, but they might be harder to find.