Catherine Aird (born 1930) is the pseudonym of author Kinn Hamilton McIntosh. She was born in Huddersfield, Yorkshire, and is the author of more than twenty crime fiction novels and story collections. Aird is creator of the Sloan and Crosby novels, set in the CID department of the fictional Berebury, West Calleshire, England. She served as Chairman of the Crime Writers' Association from 1990-91. She holds an honorary M. A. from the University of Kent and received the M.B.E. for her services to the Girl Guides Association. She lives in England.