Were the books Toby Tyler and The Graveyard Book both made into films?    No
Toby Tyler Toby Tyler is a film produced by Walt Disney Productions and distributed by Buena Vista Distribution Company on January 21, 1960. It is based on the 1880 children's book "Toby Tyler, or Ten Weeks with a Circus" by James Otis Kaler.
Nightwing (film) Nightwing is a 1979 American horror film directed by Arthur Hiller. The screenplay by Martin Cruz Smith, Steve Shagan, and Bud Shrake is based on the 1977 novel of the same title by Smith. Its tagline is "Day belongs to man, but night is theirs!" It was one of many "Jaws" rip-offs that were popular in the late 1970s and early 1980s, including "" (1977), "Tentacles" (1977), "The Pack" (1977), "Piranha" (1978), "Alligator" (1980) and "Great White" (1980). It also was Hiller's only horror film.