Marianne Macdonald (born July 9, 1934 in Kenora, Ontario) is a Canadian children's books author and novelist best known for her mystery series featuring London antiques bookstore owner and amateur investigator Dido Hoare.

Main themes of the Dido Hoare novels are responsibility and trust, the struggles of a single working mother and a complex and troubled father-daughter relationship.

Work

Dido Hoare Series

• Death's Autograph (1996)
• Ghost Walk (1997)
• Smoke Screen (1999)
• Road Kill (2000)
• Blood Lies (2001)
• Die Once (2002)
• Three Monkeys (2005)
• Faking It (2006)

Children's Books

• Black Bass Rock (1952)
• Smuggler's Cove (1955)
• The Treasure of Ur (1958)
• The Pirate Queen (1991)
• The Eighty-Nine Pennies of Emma Jones (1992)
• The Witch Repair (1995)
• Dragon for Sale (1998)

Literary Criticism

• The State of Literary Theory Today (ed.) (1982)
• Ezra Pound: Purpose/Form/Meaning (1983)
• Ezra Pound and History (ed.) (1985)