Planning a Genealogical Trip to Montreal, 2nd Edition, by Paul Leclerc, BA, BSc; 66 pp; Comb bound; 5.5x8.5; First published 2003, second edition January 2019; ISBN: 978-1-894018-77-X; Item HC19
Why? To pursue an elusive ancestor, to confirm your findings, to gather material for a family history.
Montreal has excellent collections to enable you to achieve your objectives.