[3] At the time, Brennan worked at the American Zoetrope studio as a script analyst, while Waits composed the score for One from the Heart.
[13] Her work includes co-writing and collaboration on the albums Franks Wild Years (1987),[14][15] Alice (2002), and Blood Money (2002), as well as the musicals The Black Rider (1989) and Woyzeck (2000).
[21] In 2023, Waits and Brennan oversaw reissues of remastered versions of Swordfishtrombones, Rain Dogs, Frank's Wild Years, Bone Machine, and The Black Rider.
[24] In 2015, Brennan and Waits were honored as part of the This Is Dedicated: Music's Greatest Marriages show by Jarrod Spector and Kelli Barrett.
[25] In 2016, Brennan was honored, along with Waits and John Prine, at The Song Lyrics of Literary Excellence Awards from PEN New England.