Castle La Magie: A Spell Realm Book

People come from all over the galaxy to play in Spell Realm, whose reclusive founder is the inventor of flexstone, a nanomaterial that can be shaped into any form. In Spell Realm, the guests become knights and rangers, princes and princesses, and can interact with unicorns, dragons, and anything else they can possibly imagine. And at the center of it all is the great Castle La Magie. But Millard, the young genius the founder has adopted, isn't satisfied with just role-playing.
He wants to reach worlds where magical creatures are real. Unknown to him, in a parallel world, a young wizard dissatisfied with magic is also searching for a reality where the laws of nature work differently. When they find each other, everything in both of their universe's changes - and just in time, for those universes are in danger from forces of chaos and destruction and only the two of them together can find a way to save their worlds.