- *The Lady Had Trouble in Her Shoes*: A poetry book exploring loss and resilience.
- *The Second Book of Viðar*: Fantasy novella set in the world of Viðar.
- *The Book of the Crowman*: A novel about a man's journey to find redemption.
- *The House on Sugar Beach*: A novel about a woman's journey of healing after childhood trauma.
- *A Cup of Water Under my Bed*: A poetry chapbook inspired by the Book of Psalms.
- *The Map Between Us*: A YA fantasy novel about two teens who discover they're connected in ways they never imagined.
- *All Roads Lead to You*: A YA contemporary novel about two teens who go on a cross-country road trip to find their way back home.
- *The River Has Many Voices*: A YA fantasy novel about a young woman discovering her destiny in a world of magic, prophecies, and hidden truths.
S. Lily Mendoza has also published essays and short stories in various magazines and anthologies, such as:
- *The Sun Magazine*: "The Red Thread"
- *The Rumpus*: "Finding Grace in the Shadow of Loss"
- *The Manifest-Station*: "The Art of the Unsaid"
- *The Coachella Review*: "The Way We Carry On"
- *A cappella Zoetrope*: "In Between"
- *The Offbeat*: "The Girl with the Red Balloon"
- *Crossed Genres Magazine**: "The House of Silence and Stars"
- *SFFWorld Magazine*: "The Weight of Things Left Unsaid"
- *Interfictions Online Magazine*: "The Space Between Us"
Mendoza is also a visual artist and her artwork has been featured in exhibitions, such as:
- *The Center for Maine Contemporary Art*: Juried Group Exhibition
- *The Portland Museum of Art*: The Young Contemporaries
- *The Center for Contemporary Art in Belfast*: Open Studio Series
In addition, S. Lily Mendoza has contributed book covers, illustrations, and graphic designs for various authors, publishers, and organizations.