By Jessica Martini & Christina Bossinakis LEXINGTON, KY - The Keeneland September Yearling Sale's first Book 2 session continued right on from where the auction's elite Book 1 section concluded, producing strong results largely in line with last year's record-setting renewal. During Wednesday's session, 209 yearlings sold for $64,024,000. The session average of $306,335 and the median was $255,000. During last year's Book 2 opener, 219 head grossed $66,695,000 for an average of $304,543 and a median of $250,000. With 83 horses reported not sold, the buy-back rate was 28.42%....