He's also an instructor at local universities and a regular contributor of about-town pieces to CP's Last Page. Mendelson's a novelist, too; his latest is The Oakland Quartet. Set in 1958, in working-class Pittsburgh, it follows four teen-age baseball players who commit a horrible crime and must live with the consequences. Mendelson signs copies of his self-published book at East End Book Exchange. Bill O'Driscoll 7 p.m. 4754 Liberty Ave., Bloomfield. Free. 412-224-2847 or www.eastendbookexchange.com