He advised the president and worked on various special projects—particularly in the areas of civil and human rights, Indian affairs, and the arts.

Garment was the author of two books: the autobiography Crazy Rhythm: From Brooklyn and Jazz to Nixon's White House, Watergate, and Beyond, and In Search of Deep Throat: The Greatest Political Mystery of Our Time.

[5] Before Deep Throat's identity was revealed in 2005 as being former FBI Acting Associate Director W. Mark Felt, Garment himself was a suspect.

Felt was listed as a possible Deep Throat in the book (as are many others), but was dismissed by Garment because the author believed the secret source had to have strong White House connections.

Garment speculated that, if a pardon were not quickly offered, "the whole miserable tragedy will be played out to God knows what ugly and wounding conclusion."

[7] Garment had a long association with the arts, starting with his early career as a jazz saxophonist with Woody Herman's band playing with Alan Greenspan before he entered law school.