F?lix y Calcita

"Epic! A troll has made his home in Felix's bedroom! And yuuuck! It smells like moldy cheese! It's named Calcita and he's come here through the toy box and he eats rocks, yes, yes, rocks! Felix will discover that his house is connected to the troll world, and he'll travel there with Calcita and discover that they've spent years fighting the gnomes. Will Felix be able to get the trolls and gnomes to be friends again? And will he get back to his house in time for dinner?"--From the publisher's web site.