* The Jester (1992): This was his first book, which he wrote under the pseudonym "James Patterson". It's a psychological thriller about a man who finds himself accused of a crime he doesn't remember.
* The Lake House (2005): This supernatural romance story was later adapted into a film starring Sandra Bullock and Keanu Reeves.
* The Woman in the Suitcase (2017): A standalone thriller about a woman who discovers a suitcase with a woman's body inside.
* The 14th Colony (2021): A historical thriller about a group of colonists who set out to find a new home in the Americas.
It's important to note that Patterson often collaborates with other authors, so some of his standalone books may actually be co-authored.
To find a definitive list of James Patterson's standalone books, you can check his official website or browse online retailers like Amazon. You can also look up specific books to check their series information.