The Maths Fan. Laine

Markus and his alien friend Peeter have just finished first grade, and summer holiday has begun. Suddenly, the school principal comes calling, wanting to meet Peeter’s “aunt” Laine—who, supposedly, has helped him become so clever through homeschooling. The problem is… Aunt Laine does not exist. Markus’s parents invented her in order to avoid telling the principal the truth about Peeter.

Now comes the tricky part: finding a suitable aunt and getting her to Võrumaa. Along the way, the friends embark on wildly unpredictable adventures that take them from distant planets to the depths of Võrumaa’s forests.-------------------
Third book in the series of The Math's Fan. A humorous series that makes you love maths without even trying.