Book The Tenth: The Slippery Slope
Violet and Klaus Baudelaire make their way up the Mortmain Mountain,after escaping death, to rescue their sister Sunny from Count Olaf and his troupe. They meet Quigley Quagmire, a character who they thought to be dead, and visit the headquarters of a mysterious organization called "V.F.D." only to realize it had burned down. All the hopes of finding answers went up in smoke. They are reunited with Sunny and manage to escape from Olaf and his troupe, but in order to escape from Olaf they end up in more danger than before.