Patricia Reilly Giff was born in Brooklyn, New York on April 26, 1935. She knew she wanted to be a writer, even as a little girl. She received a Bachelor of Arts in Education from Marymount College, a Master's of Arts from St. John's University, and a Professional Diploma in Reading and a Doctorate of Humane Letters from Hofstra University.

After she graduated from college, she taught in the public schools in New York City until 1960 and then in the public schools in Elmont, New York from 1964 until 1971. She then became a reading consultant before finally, at the age of 40, deciding to write a book. She also worked as an educational consultant for Dell Yearling and Young Yearling Books and as an advisor and instructor to aspiring writers. Her first book, Today Was a Terrible Day, was published in 1980. She is the author of more than 100 children's books, as well as a member of the Society of Children's Book Writers.

Together with her husband, Giff opened "The Dinosaur's Paw," a children's bookstore named after one of her own stories. She is the author of the Polk Street School books. Lily's Crossing, about the homefront during World War II, was named a Newberry Honor Book by the American Library Association as well as an ALA Notable Book for Children. The novel also won the Boston Globe-Horn Book Award Honor. Her companion book to Lily's Crossing, Genevieve's War, won a 2018 Christopher Award. Pictures of Hollis Woods was also named a Newberry Honor Book and Nory Ryan's Song was named an ALA Best Book for Young Adults.

Patricia Reilly Giff died on June 22, 2021. She was 86.

(Bowker Author Biography)