Eight Mondays of Vitya Baklajanov

As someone aptly noted in the comments to the announcement of this book — a school Groundhog Day.
Indeed, third grader Vitya wakes up every day in the same Monday. But in different incarnations. Sometimes he becomes his dad, sometimes a... friend, even a classmate and a teacher. And he looks at the same situation through different eyes, from the perspective of various involved parties.
Only when Vitya realizes that he has offended everyone around for nothing, will he be able to return to his usual life and finally wake up on Tuesday.
The book is full of humor and witty dialogues. It's a page-turner!