Sowa is the author of the autobiographical comic Marzi, a series of comics about her childhood in 1980s-era Poland. She writes about life under communism, food shortages, and her childish escapades. The illustrator is Sylvain Savoia, Sowa's life partner. So far, six volumes of Marzi have been published by comic book publisher Dupuis. In Poland, the first three volumes were collected and published by Egmont. Marzi is also translated into Spanish, in 2011 into English and in 2012 into Czech.
