Elena Burak is a contemporary children’s writer, poet, psychologist, a member of the Union of Children’s and Youth Writers, a finalist of the Korney Chukovsky Prize and the Open Regional Prize named after Yuri Magalif, and a semi-finalist of the Korney Chukovsky Prize. Ulyana, the heroine of Elena Burak’s new book “Challenge, or Mishka_on_the_North,” constantly goes through various ridiculous challenges invented by her best friend. In this way, Taya tries to build confidence in Ula and develop other qualities she needs. Ulyana is so tired of it all! But in the end, the girl comes up with one final challenge for herself. Its motto is “I must do it (я повинна діяти).” Ula has firmly decided to be decisive. And then—suddenly—her social media page is interested in a mysterious Mishka_on_the_North… For middle-school readers.