Translation: John Petrucci Jazz III Plectrum was designed to the prog rock legend John Petrucci 's own specifications.
Translation: Guitar World Presents John Petrucci's Wild Stringdom by John Petrucci. Guitar Tablature sheet music. Method.
Translation: John Petrucci - Rock Discipline. John Petrucci -- Rock Discipline composed by John Petrucci.
Translation: , John personally guides you through every aspect and a creative musician. With well over 130 music examples and solos.