Lemony Snicket is not a real person, but Daniel Handler is. Handler wrote the 13-book A Series of Unfortunate Events, the last installment of which was released on Friday the 13th of October, 2006. More recently, hereleased the first book of a new series. All The Wrong Questions is about young Lemony Snicket's efforts to solve a mystery in a seaside town no longer by the sea. "Who Could That Be At This Hour?," the first of four books, addresses the first incorrect question that he asks during the process.
Handler has an important place in children's literature. He addresses sinister topics, particularly in A Series of Unfortunate Events. He uses high literary allusions in his pieces (the Baudelaire orphans and Esme Squalor are some of his character names). A lot of these are more present in A Series of Unfortunate Events, but All The Wrong Questions is still a vocabulary lesson with mentions of other literary works.
Handler has written about his thoughts on talking to children about serious topics (here, for example). I will use this source as well as interviews with him to profile his motivations for writing about these topics and about what that means for children. I'd love to actually talk to him, but I'm assuming his publisher will shut me down on that one (probably going to call and try though...)