Complex sentence: She became an editor in her own right with the children's "St. Nicholas Magazine", for she was able to solicit stories from a number of well-known writers including Mark Twain, Louisa May Alcott, and Robert Louis Stevenson.
Split into simpler sentences: She became an editor in her own right with the children's magazine, "St. Nicholas". She was able to solicit stories from a number of well-known writers including Mark Twain, Louisa May Alcott, and Robert Louis Stevenson.