Were the books Toby Tyler and The Graveyard Book both made into films?    No
The Graveyard Book The Graveyard Book is a children's fantasy novel by the English author Neil Gaiman, simultaneously published in Britain and America during 2008. "The Graveyard Book" traces the story of the boy Nobody "Bod" Owens who is adopted and raised by the supernatural occupants of a graveyard after his family is brutally murdered.
Sliver (film) Sliver is a 1993 erotic thriller film based on the Ira Levin novel of the same name about the mysterious occurrences in a privately owned New York high-rise apartment building. Phillip Noyce directed the film, from a screenplay by Joe Eszterhas. Because of a major battle with the MPAA (which originally gave the film an NC-17 rating), the filmmakers were forced to make extensive reshoots before release. These reshoots actually necessitated changing the killer's identity. The film stars Sharon Stone, William Baldwin and Tom Berenger.