Looks as if they are correct. This is a great three-book starter set for the series. Lemony Snicket has made a great series of books for those people that can't stand everything being sweetness and light. In the process we learn many lessons in life from grammar to etiquette. Similar to Rocky and Bullwinkle there is something for everyone at any age.
It would be wise to buy this three book set as you will be hooked on the story from the beginning and have all three books finished before you have a chance to buy the forth.
Coming in a case allows you to set the books up on the shelf without needing any supporting books or book ends.
I will not go through the contents of the books, as you will get a better idea of what you are purchasing from the individual reviews. However the books included in this set are "The Bad Beginning," "The Reptile Room," and "The Wide Window." Be sure to look for my individual reviews of each book. In each you will se the pattern that makes this series popular and maybe learn a little something on the side.