The energy, honesty and easygoing charisma that have made Pat Green a star in his home state are in abundant supply on his second Republic/Universal release, Wave on Wave. At the same time, the album-produced by Don Gehman, whose resume includes work with the likes of John Mellencamp, Hootie and the Blowfish, Nanci Griffith, Bruce Hornsby and R.E.M.- also represents a bold leap forward for the artist, boasting both an expanded musical palette and a thoughtful, introspective lyrical depth that adds a new layer of emotional complexity to the humble Green's regular-guy image.