The Secrets of Droon; Journey to Volcano Place by Tony Abbott

This book is about a magical land and these three kids and one of the kids house his basement has a portal and they walk through it and got to the magical land called droon. Three other friends during their adventure in droon and they go to a volcano palace trying to get a red dragon's eye from evil spar and eventually they get it and find out spar's secret. And soon they get back home and everything is normal again.