Summer vacation is finally here and nothing will stop Mickey Marne from enjoying it! Not even an argument with his parents that makes him go to his grandma and grandpa on his own instead of going on a joint vacation to Croatia. And directly... to Prčica! He doesn't expect much fun from it, but he soon finds out that he was very mistaken. It turns out that grandpa is a good jokester and that you can experience a lot of funny things with grandma too, like celebrating Christmas in July! And what if Miky meets the irresistible collie Barunka, which belongs to grandfather's friend Mr. Vomáček - it's love at first sight! The book is intended for children aged 8 and over.