Seeking info on Scandinavian bookstore in Chicago

Hi everyone, I've been researching my Norwegian ancestors in Chicago and have found a picture of my great-great-grandfather's store. His name was Iver F. Iverson, he was married to Ellen Marie Theslie (also spelled Elen, Maria, Thestli, and Tesli). They had one son, Arthur Louis Iverson. They appear in the census and city directory between about 1880 - 1900, and Iver is sometimes listed as a "sailor"-- we knew he sailed on Lake Michigan-- and sometimes listed as a "clerk." However, I'm not able to find any digital records of him operating this store. The store is called "Scandinavian Book Store" at address 95 (not sure of the street name). You can see from the sign on the sidewalk that they also sold steamship tickets, railroad tickets, drafts, and money orders. Family rumor says that Iver's business partner left, and Iver disappeared shortly after. We therefore don't know when or where he died. If anyone could help me figure out more about this bookstore, such as where it was located, what the exact year was, or who the business partner was, I'd greatly appreciate it! Thank you, Carrie [img][View image][/img]