 Along with pavilion design , Lissitzky began experimenting with print media again . His work with book and periodical design was perhaps some of his most accomplished and influential . He launched radical innovations in typography and photomontage , two fields in which he was particularly adept . He even designed a photomontage birth announcement in 1930 for his recently born son , Jen . The image itself is seen as being another personal endorsement of the Soviet Union , as it superimposed an image of the infant Jen over a factory chimney , linking Jen 's future with his country 's industrial progress . Around this time , Lissitzky 's interest in book design escalated . In his remaining years , some of his most challenging and innovative works in this field would develop . In discussing his vision of the book , he wrote : 
