Who is Mr Oswald in Jeremy fink?

In "Jeremy Fink and the Meaning of Life" by Wendy Mass, Mr. Oswald is a quirky and insightful character who works at the local library. He serves as a mentor to Jeremy and his friend, helping them navigate their quest to understand the meaning of life through the clues left in Jeremy's mysterious box. Mr. Oswald's wisdom and unconventional perspective encourage the young protagonists to think deeply and explore their own beliefs and values.