

In the late 2010s, their other son Andrew co-wrote the last two Nate books written while Marjorie Weinman Sharmat was alive. During the 1990s, their son Craig Sharmat (then in his thirties) wrote three Nate books with his mother. Husband and wife wrote four Olivia Sharp books published 1989 to 1991.

Sharmat's husband Mitchell Sharmat expanded Nate's storyline by creating Olivia Sharp, his cousin and fellow detective. One story, Nate the Great Goes Undercover, was adapted as a made-for-TV movie that won the Los Angeles International Children's Film Festival Award. He was inspired by and named after her father, who lived to see the first Nate book published. Perhaps Sharmat's most popular work features the child detective Nate the Great. They have won awards including Book of the Year by the Library of Congress or have become selections by the Literary Guild. She wrote more than 130 books for children and teens and her books have been translated into several languages. Marjorie Weinman Sharmat (Novem– Ma) was an American children's writer. Book of the Year Citation from the Library of Congress 1967
