Killing Mr. Griffin (Google Books ⧉, Amazon ⧉, Bookshop ⧉)

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The book is Killing Mr. Griffin, a young adult novel by Lois Duncan about some teens who, as a prank, kidnap a teacher, who then has a medical emergency and dies. The book is really about their remorse and a reflection on what they did and how wrong it was and how even though his death was not their intent, it happened anyway.