Short answers, pulled from the story.
Charles Scribner I and Isaac D. Baker opened their doors as Baker & Scribner in the year 1846. This partnership initially focused on selling school books and religious texts to local communities before evolving into a major publishing dynasty.
The company launched Hours at Home in 1865, followed by Scribner's Monthly in 1870 under John Blair Scribner. They also introduced St. Nicholas Magazine in 1873 with Mary Mapes Dodge as editor and later released Century Magazine after other partners sold their stake in 1881.
Maxwell Perkins worked closely with F. Scott Fitzgerald, Thomas Wolfe, Ernest Hemingway, Ring Lardner, and Erskine Caldwell while shaping American voices for the firm. The children's book division established in 1934 brought N.C. Wyeth and Robert A. Heinlein into the fold alongside Marjorie Kinnan Rawlings.
Charles Scribner's Sons merged with Atheneum in 1978 to form The Scribner Book Companies ending independent family ownership. Macmillan Inc. acquired the combined entity four years later in 1984 before Simon & Schuster purchased Macmillan in 1994.
Nan Graham currently serves as publisher overseeing daily operations following Susan Moldow who held the presidency from 1994 until 2012. Cengage Group now owns the reference division while Kohlberg Kravis Roberts controls the trade publishing arm under Simon & Schuster.