Week 15 of the Medford Farmers Market will feature live music by Sweet Wednesday from 3 to 5 p.m. and David Rivera Bozon from 5 to 7 p.m. Sweet Wednesday is the award-winning folk/roots rock duo of Lisa Housman and Dave Falk; they’ll perform original songs live with vocals, harmonies, guitars, mandolin, and keys. Bozon is an outstanding international tenor based in Boston; his performances are family friendly, fun, and engaging for classical music connoisseurs and newcomers. Today’s market also will host representatives from CACHE member Friends of the Medford Public Library, whose annual fall book sale is approaching on September 22-24. Visit the Farmers Market website for the complete list of this week’s vendors, artisans, and other activities. The market takes place at the Condon Shell park from 3 to 7 p.m. every Thursday through October 12.