Jensen started her career working as a teen, youth, and adult librarian in
public libraries in northern Illinois and southern Wisconsin. While working as a librarian in 2009, she and a graduate school classmate began a book blog called
Stacked. She later began writing a newsletter called
Well Sourced.
Book Riot Jensen joined the literary website
Book Riot in 2013. That year, Jensen and Amaral were named "Free Speech Heroes" by the
National Coalition Against Censorship. In July 2021, Jensen began writing a regular "Censorship News" column for
Book Riot, tracking the increase in
book banning in the United States.
Publishers Weekly described her as "one of the most important voices chronicling [the] movement to ban books, her column effectively creating a historical record as it unfolds". She has also worked with Chicago libraries to train staff on how to respond to book bans.
Publishers Weekly named Jensen in their "People of the Year" list in 2022 for her anti-censorship work. In August 2023, the
American Association of School Librarians formally commended Jensen's censorship column in
Book Riot.
Library Journal listed Jensen on their 2024 "Movers & Shakers" list in the "Ban Battlers" category. In 2018, Jensen published ''(Don't) Call Me Crazy
, an anthology of writing about mental health. The anthology was included in The Washington Post'' "Best Children's Books of 2018" list, and was named an Honor Book by the
Schneider Family Book Award. Jensen's 2020 anthology,
Body Talk, discusses body-related topics including sexuality, gender identity, disability, and weight. The book was banned in school districts in several states, including Tennessee, Missouri, New Hampshire, and Florida. == Personal life ==