Sinclair, American novelist, essayist, playwright, and short story writer, whose works reflected his socialistic views. Among his most famous books is The Jungle, which launched a government investigation of the meatpacking plants of Chicago, and changed the food laws of America. Sinclair's book of practical counsel discussing the conduct of life from modern standards. What do present day men and women need to know in order to live wisely? What are the paths to happiness, the laws of health both of mind and body? These questions are here discussed in simple language and a spirit of good fellowship.