In May 1968, “Columbia” label released “Underground”, the 24^th Thelonious Monk album. It was recorded in December 1967, February – December 1968, and was produced by Teo Macero.

Personnel:

• Thelonious Monk – piano
• Charlie Rouse – tenor saxophone
• Larry Gales – bass
• Ben Riley – drums
• Jon Hendricks – vocals
• Tim Geelan – engineer
• John Berg, Richard Mantel – art direction
• Horn Grinner Studios – photography

Track listing:

All tracks by Thelonious Monk, except where noted.

1. Thelonious
2. Ugly Beauty
3. Raise Four
4. Boo Boo’s Birthday
5. Easy Street – A.R. Jones
6. Green Chimneys
7. In Walked Bud