Her works include Cured, Rise of the Rocket Girls, The Queens of Animation, Wise Gals and The Beast in the Clouds.

[13] She chronicles the prejudice faced by the artists and the triumphs contributed to American film by Mary Blair, Retta Scott, and Gyo Fujikawa.

[14] Holt's book Wise Gals: The Spies Who Built The CIA And Changed The Future of Espionage (2022) explores the unsung female spies of WWII who built the CIA[15] She tells the stories of Eloise Page and Elizabeth Sudmeier who used espionage against Nazi Germany during World War II and the Soviet Union during the early Cold War.

[17] Her book Cured: The People Who Defeated HIV (2015) discusses the scientific complexities of two patients who have been exceptions to the usual procession of AIDS.

Each has experienced a "functional cure", raising hopes that researchers may someday find a "safe and reliable way" to protect patients against HIV.