Author of the I Spy children's book series, and Hudson Valley resident, Jean Marzollo has passed away.

Growing up one of my favorite books was I Spy.

Some may see it as just a picture book, but for me it brings back fun, competitive memories of me and my brother trying to find more hidden objects.

If you're not familiar with the I Spy series, they were a collection of picture books with riddles at the bottom of every page.

Marzollo wrote over 150 children's books including Pierre the Penguin, The Little Plant Doctor, Soccer Sam, and Happy Birthday Martin Luther King, passed away on Tuesday, April 10 at the age of 75.

According to the Highlands Current, Jean passed peacefully of natural causes in her sleep.

Jean and her family moved to the Cold Spring area in the mid-1970s.

Back in November of 2017, Cold Spring's local library, the Butterfield Library, named its children’s room in Jean's honor.