It's important to note that:
* Daniel Handler is the real name of the author. He has published all his books under this name.
* Lemony Snicket is a fictional character. Handler created Lemony Snicket as the narrator for the "A Series of Unfortunate Events" books.
* Authors sometimes use pseudonyms. There are many reasons why authors might use a pen name, but Handler has chosen to publish under his real name.
So, while Lemony Snicket is a very real and beloved fictional character, Daniel Handler is the author's real identity.