Na zbirki dveh zgoščenk bo 30 skladb, ki se osredotočajo na samostojno kariero nekdanjega Led Zeppelin vokalista, pri čemer bodo tri med njimi takšne, ki do danes še niso bile izdane, to so Nothing Takes The Place Of You, Charlie Patton Highway (Turn It Up – Part 1) in Too Much Alike, v kateri sodeluje tudi Patty Griffin.
Robert Plant- Digging Deep: Subterranea vsebuje naslednje skladbe:
CD1
1. Rainbow
2. Hurting Kind
3. Shine It All Around
4. Ship of Fools
5. Nothing Takes The Place Of You – Previously unreleased
6. Darkness, Darkness
7. Heaven Knows
8. In the Mood
9. Charlie Patton Highway (Turn It Up – Part 1) – Previously unreleased
10. New World
11. Like I’ve Never Been Gone
12. I Believe
13. Dance with You Tonight
14. Satan Your Kingdom Must Come Down
15. Great Spirit (Acoustic)
CD2
1. Angel Dance
2. Takamba
3. Anniversary
4. Wreckless Love
5. White Clean & Neat
6. Silver Rider
7. Fat Lip
8. 29 Palms
9. Last Time I Saw Her
10 Embrace Another Fall
11. Too Much Alike – Previously unreleased
12. Big Log
13. Falling in Love Again
14. Memory Song (Hello Hello)
15. Promised Land
