In February 2005, Cummings started a blog, The QC Report, which discussed the ironies of modern life from the point of view of a career mother in her 30s. Cummings' first book, Notes From The Underwire: Adventures from My Awkward and Lovely Life was published in July 2009. Her second book, The Year of Learning Dangerously, which explores the current state of home schooling in America, was published by Perigee Books in August 2012. Pet Sounds, a collection of humorous stories relating to animals and pet ownership was released in the summer of 2013. In 2019, she launched a podcast: "Quinn Cummings Gives Bad Advice" in which she responds to listener questions on any advice topic, highlighting the fact that she has no particular knowledge or expertise in the subject being raised.