If you had a bowl of corn flakes this morning, you have John and Will Kellogg to thank. Howard Markel talks to host Krys Boyd about the 19th Century wellness trend that led to the invention of the cereal – and about how their company shaped manufacturing, philanthropy and even medicine. He tells the siblings’ story in “The Kelloggs: The Battling Brothers of Battle Creek” (Pantheon). Markel talks about the book tonight during an Authors Live! event at Highland Park United Methodist Church.