This comprehensive method book and DVD by Bruce Gertz, titled "Mastering The Bass," is perfect for intermediate level bass players seeking to improve their skills on both electric and upright bass. Published in 2003 by Mel Bay, this instructional material covers various subject areas including music theory, technique, and improvisation.

The package includes both a DVD and paperback format, with instructions in English. This item is a great addition to any bass player who is looking to improve on their skills.