Adam Swanson is a fifteen-year-old pianist from Michigan who will soon be moving to Iowa.   He has been playing the piano for about five years, and is an accomplished ragtime pianist, performer, and historian/author.   He discovered ragtime on his grandparents' "Web-TV."   Adam is a three-time junior champion of the World Championship of Old-Time Piano Playing Contest, held in Peoria, Illinois.   He has played at ragtime and jazz festivals in Missouri, Wisconsin, California, and most recently at a festival in the Republic of Hungary.   He has played with several noted ragtime artists, including Johnny Maddox.   Adam studies piano with Waleed Howrani of Ann Arbor, Michigan and plays the trumpet in school.   He is also an avid rail-fan and collects antique sheet music and records.