In 2015 , Bookboon was mentioned in newspapers such as the German " Handelsblatt " and one of its Swedish books was featured in the Swedish Metro .
In 2015 , Bookboon was mentioned in newspapers such as the German Handelsblatt " , and one of its Swedish books was presented in the Swedish U-Bahn .
In 2015 , Bookboon was mentioned in newspapers such as the German Handelsblatt " , and one of its Swedish books was presented in the Swedish U-Bahn .
为这句话写一个解释: In 2015 , Bookboon was mentioned in newspapers such as the German " Handelsblatt " and one of its Swedish books was featured in the Swedish Metro . 输出: