She is the author of Mythos, a prose novel featuring Wonder Woman (DC/Pocket Books, 2003),Goodnight, Irene: The Collected Stories of Irene Van de Kamp (Last Gasp, 2007), and The Big Skinny: How I Changed My Fattitude, a Memoir (Villard, 2008).
In 2012, Lay and a friend started Waylay Comics to adapt her long-out-of-print and never-before-reprinted weekly strips into the Mobipocket format for Kindle.
In 2013, Lay created MURDERVILLE#1: "A Farewell to Armories", a self-published, small-print-run, Kickstarter-funded comic featuring twenty-four pages of story plus four front & back, outside & inside cover pages.
On January 26, 2015, Carol Lay's LAY LINES page began on GoComics with a week-long serialization of her story "The Thing Under the Futon" [1/26/2015-1/30/2015], followed by serializations of "Now, Endsville" [2/3/2015-4/10/2015] and "Invisible City" [4/12/2015- ].
Goodnight, Irene: The Collected Stories of Irene Van de Kamp, Last Gasp, 2007. ISBN 978-0-86719-659-7. (collects the Irene Van de Camp stories from Good Girls plus a cover gallery and "About Face" (2006), a new 18-page story drawn for the collection)
Lay, Carol (w, a), Hamill, Nathan (col), Bates, Karen (let), Kane, Nathan (ed). "Scent of a Baby" Maggie 1 (October 2012), Bongo Comics
CAROL LAY'S ILLITERATURE: STORY MINUTES Volume One, Boom! Town, 2012. ISBN 978-1-60886-282-5. (First of a prospective four volumes, contains 103 STORY MINUTE strips from 1997-1999, plus an Introduction by Kim Deitch.)
Lay, Carol (w, a), Hamill, Nathan (col), Bates, Karen (let), Kane, Nathan (ed). "Maggie and the Moon" Bart Simpson 80 (February 2013), Bongo Comics
Lay, Carol (w, a), Villanueva, Art (col), Bates, Karen (let), Kane, Nathan (ed). "The Murder Party" Simpsons Comics 201 (April 2013), Bongo Comics
Lay, Carol (w, a), Lay, Carol (col), Lay, Carol (let), Lay, Carol (ed). "A Farewell to Armories" MURDERVILLE 1 -- 24 story pages + 4 front & back cover pages -- Kickstarter-funded, self-published (September 2013), Carol Lay
BART SIMPSON TO THE RESCUE, Harper, 2014. ISBN 978-0-06-230183-3. (Includes reprints of Carol Lay's SIMPSONS stories "The Mystery of the Pesky Desk", "Fortunate Son", "A Tomb With a View", and "Pranks a Lot".)
BART SIMPSON BLASTOFF, Harper, 2015. ISBN 978-0-06-236061-8. (Includes reprints of Carol Lay's SIMPSONS stories "Sleepless in Springfield", "The Princess Principle", and "The Planet of the Plants".}