[10][11] In October 2020 her book Secrets of the Sprakkar: Iceland's Extraordinary Women and How They Are Changing the World was announced, and has been published by Sourcebooks in the US and Simon & Schuster in Canada in 2022.

[12][13] The book was well-received[14][15] and gained endorsements from numerous high-profile authors,[16] as well as from Hillary Clinton, and became a national bestseller in Canada.

In September 2017, Reid visited the Za’atari refugee camp in Jordan at the invitation of UN Women.

In 2017, she was named a United Nations Special Ambassador for Tourism and the Sustainable Development Goals.

[25] On 31 August 2019, Reid used her public Facebook page to respond to an opinion article by Zoe Williams in the British newspaper The Guardian, which criticized the media coverage of the spouses of global leaders attending the 2019 G7 conference, writing "I make a concerted effort not to be seen as an accessory to my husband".

[29][30] On 4 September 2019, Reid was the subject of political and media speculation for wearing a white pantsuit[31] to a meeting with US Vice President Michael Pence and Second Lady Karen Pence in Reykjavik, which many saw as a symbol of solidarity with other global gender parity initiatives such as #TimesUp #MeToo and modern day Women's Rights and Suffragettes movements.

[32] She wore a rainbow bracelet on her wrist to the Pence meeting as well, which has been seen as a show of solidarity with the LGBTQA community.

In October 2021, Reid directed attention to the marginalizing practices of the media, after they left her name off of a photo credit after the visit to Iceland by the Crown Prince of Denmark,[34] asking "do women exist?"