Self-made millionaire James Gatz reinvents himself under a new name in which 1925 novel?

Which dictator wrote "Mein Kampf" ("My Struggle"), first published in 1925? In 1924, Chamonix, France, hosted the first of which international sporting events? Which Nobel Peace Prize winner, whose middle name was Gates, was vice president from 1925 to 1929? Which author created the wealthy Long Island enclave of East Egg in a 1925 novel? Which famous magician and escape artist died in 1926 following a ruptured appendix? "Red Cavalry," a famous 1926 collection of tales, was written by which Russian author? One of the top-selling novels of 1926 was which Anita Loos book about the gold digger Lorelei Lee? In which 1927 film does Al Jolson say, "Wait a minute, wait a minute, you ain't heard nothin' yet"?