*Valid September 30, 2024 - December 25, 2024 at Canadian stores and at indigo.ca, while quantities last, with $50.00 or more pre-tax purchase of eligible product(s), after discounts and plum points redemptions. Minimum purchase amount excludes gift cards, plum+ memberships, Love of Reading products/donations, and shipping costs. Selection may vary between stores and online.
The Slide-Rule, and How to Use It/en-ca/the-slide-rule-and-how-to-use-it/3DF48E8A-5AA5-49C0-A8CA-D891270A62D0.html3DF48E8A-5AA5-49C0-A8CA-D891270A62D0