Ed Friedland: Pentatonic Scales For Bass (Bass Builders): Fingerings, Exercises and Proper Usage of the Essential Five Note

The Bassist's Book of Scales and Arpeggios: Methods Exercises for Electric Bass

Bass Guitar Scales 365: 52 Weeks of Daily Exercises—Major, Minor, Pentatonic &...

Ray Brown's Bass Method: Essential Scales, Patterns and Exercises (Eagle Large Print)

Pentatonic Soloing for Electric Bass: Master & Use Scales as a Framework...